FF Systems FF-8070 Manuale utente

FF-8070

Operations Manual

Digital Voice Recorder

Revised December 14, 2002

P.O. Box 5533

Round Rock, TX 78683

512-365-1120 (voice)

FFSYSTEMS

" AFFORDABLE REPEATER CONTROL SOLUTIONS "

FF-8070 Digital Voice Recorder V2.24

Table of Contents

Warranty............................................................................................1

Introduction........................................................................................2

Operation Overview...............................................................................2

Installation..........................................................................................3

DVR Functions ....................................................................................3

User Commands...................................................................................4

Configuration Commands........................................................................7

FF-800 Interface Programming..................................................................10

FF-8070 Command Examples...................................................................11

Adjustments........................................................................................13

APPENDIX A

FF-8070 WIRING.......................................................................14

APPENDIX B

FF-8070 Track Allocation...............................................................15

APPENDIX C

Adding DRAM............................................................................15

APPENDIX D

Schematic and Parts List.................................................................16

Warranty

FF Systems warrants its products to be free from defects for one year from the date of shipment.

FF Systems may opt to repair or replace (at our option) any defective product. FF Systems does

not warrant any defect due to lightning or other natural disaster. Any user modifications or repairs

to any product sold by FF Systems shall void this warranty. All returns must be accompanied by a

Return Material Authorization (RMA) number provided by FF Systems prior to shipment.

Shipments that do not have the proper return authorization prominently noted on the outside of the

package will not be accepted. The purchaser is responsible for all shipping charges for any service

procedure(s) performed by FF Systems (including warranty service).

30 Day Money Back Guarantee

FF Systems offers a 30 day trial period on all products. The 30 day trial begins 5 calendar days

after shipment from FF Systems. If the purchaser decides to return a product they must contact FF

Systems for a Return Material Authorization (RMA) number on or before 6:00pm central time

within 35 calendar days of the original shipment date. The purchaser then has fourteen additional

calendar days to return the merchandise to FF Systems. FF Systems claims no liability for lost or

mis-directed shipments. The purchaser is responsible for all shipping charges.

Product Condition

Products must be in new condition or warranty repairable to qualify for refund. If merchandise

incurs damage not covered under warranty, the refund will be delayed until the unit has been

repaired and the cost of that repair shall be deducted from the refund. FF Systems is not

responsible for damages incurred during shipment -- the purchaser should insure the merchandise

for the purchase amount to avoid possible loss due to damage during shipment.

Contact Address

FF Systems

P.O. Box 5533

Round Rock, TX 78683

512-365-1120 (voice)

e-mail:[email protected]

web: http://www.rollanet.org/~joeh/

Introduction

The FF-8070 DVR (Digital Voice Recorder) is a microprocessor controlled audio record and

playback interface designed for the FF-800 Repeater Controller. The FF-8070 accepts DTMF

commands and audio via the FF-800 and includes provisions for record or playback from the FF-

800 control autopatch. The recording of messages is divided into three areas: 1) System tracks, 2)

Voice mail, and 3) Audio test. System messages are primarily used by the FF-800 (as assigned by

the user) to play DVR tracks in ID bulletins, function annunciators, tail messages, etc.... The

voice mail and audio test features are primarily for use by repeater users via DTMF commands.

The voice mail feature allows users to record and receive messages. The status of the mail box can

be interrogated manually (allowing users to interrogate the mailbox to see if they have any

messages), or the FF-800 may automatically poll the mailbox status via speech macro commands.

The audio test records a sample of audio up to 20 seconds long on a test track and immediately

replays the test track to provide users with a means of monitoring their signal quality -- this feature

is also useful for adjusting the DVR levels after installation.

It should be noted that the system tracks and the mail box tracks are separate and there are different

command sets to record and play the two types of tracks. NOTE: the audio test and mail box

tracks can not be directly accessed by the FF-800 speech macro commands. Speech macros are

special "words" that are used in FF-800 messages to trigger the DVR play a track.

Operation Overview

The FF-8070 DVR uses Continuously Variable, Slope-Delta (CVSD) modulation to store audio

signals as a stream of single bit values. The system must over-sample to eliminate the carrier

frequency -- in this case the sample frequency is 50KHz. The bit stream is stored on 1 megabit

DRAMS each of which can hold about 20 seconds of sampled audio. The FF-8070 comes

standard with 8 one megabit DRAMS with room for additional memory (up to a maximum total of

32 DRAMS).

The DVR memory architecture is organized as 8 banks of 4 DRAMS each, which means that you

should add memory to the DVR in blocks of 4 devices at a time. The memory expansion connector

(P1) allows the FF-8070EXP memory expansion board to be installed which allows an additional

32 DRAMS for a total of 64 megabits of storage (over 21 minutes of total audio record time). The

DVR separates the banks of memory into "system" and "mailbox" areas. By selecting how many

mailbox tracks you desire (# MAIL Tracks, command suffix <053>), the system will allocate

the number of banks available to the system tracks. Note that the mailbox tracks are selected at the

expense of system track memory. The factory defaults is to select 3 mailbox tracks. This takes

one bank of DRAM, which leaves one bank available for system tracks (given the 8 DRAMs that

are factory standard).

There are 100 system tracks available (7 of which are used as prompts for the voice mail) and these

tracks reside in the system section of the DVR memory. The FF-8070 DVR is a random access

system, which means that tracks can be recorded and rerecorded as often as desired without any

special consideration for any previous record operations. The only stipulation is that the maximum

record time of each track can not be exceeded. Each track is allocated a certain maximum record

time, this time can range from one second up to 83 seconds for an individual track. Each track is

preallocated at the factory but the user can modify the record time allocations for the system tracks

to meet their special needs. Tracks can be reallocated after the DVR has been in service, but all

reallocated tracks must be rerecorded -- appendix B discusses the allocation process in more detail.

The mail box section holds the mail box tracks as well as the DVR test track. Thus, if the user

turns off the mail box (by selecting 0 mailbox slots), the DVR test feature is also disabled. If the

mail box is turned off, the seven prompt tracks can be used as general system tracks. On power

up, the DVR clears all tracks (but not configuration data like prefixes, record time allocations,

etc..., these are maintained in nonvolitile memory). Thus, the mail box prompt tracks must be

recorded after power up in order for the mail box prompts to function properly. A battery back-up

connector is provided to maintain the DVR speech memory in the event of a power failure. The

installation section discusses the connection of an appropriate battery.

Installation

The wiring of the DVR is accomplished through three connectors on the FF-8070 board. The

following lists those connectors along with their signal descriptions: ~ = Active low signal

P2: Battery * P3a: DVR I/O * P3 (legacy) P5: SPI Bus * P3: DVR I/O

(molex 3 pin) (IDC 10 pin) (molex 9 pin ) (IDC 10 pin) (2 pin header)

1) Battery (-) 1) DVR in (A) 1) DVR in (A) 1) MOSI

2) Battery (+) 2) GND 2) GND 2) GND 2) GND

3) Battery (-) 3) DVR out 3) ~CMD unlock 3) SPCK 3) ~CMD unlock

4) GND 4) n/c 4) GND

5) GND 5) n/c 5) MISO

6) GND 6) DVR in (B) 6) GND

7) DVR in (B) 7) DVR out 7) ~RST1

8) +12V in 8) +12V in 8) n/c

9) GND 9) GND 9) n/c

10) +12V in 10) Reset

* Note: legacy P3 connector supports FF-800 controllers manufactured prior to 2001 and is

generally not installed.

P1 & P4 are for DVR expansion and their pin-outs are detailed in the schematic for user reference.

The battery input (P2) should be connected to a battery for maintaining DVR operation during

power interruptions. The battery must be greater than 9 volts accross its discharge cycle, and less

than the voltage at P3-8 for proper operation. A 3 AHr lead-acid-cell will maintain power for over

30 hours. It is generally recommended that a 12V battery be used with at least 1Ahr of capacity.

Note that the FF-8070 has no provisions for charging the back-up battery, an external

charge/maintenance system must be supplied by the user.

P3a and P5 use factory supplied ribbon cables to connect to the FF-800. P3a on the DVR connects

to P25 on the FF-800, while P5 on the DVR connects to P7 on the FF-800.

The FF-8070 card should be placed in an RF tight enclosure and be placed as close as practical to

the FF-800. It is recommended that the FF-8070 be installed in the same chassis as the FF-800 to

allow the cable lengths to be kept to a minimum.

DVR Functions

The FF-800 SPI interface commands use a prefix-suffix syntax. The user-defined prefixes may be

1 to 4 digits long and are used to access the various interfaces connected to the FF-800 SPI bus.

The SPI protocol assigns a fixed address to each interface that is connected to the bus. These

addresses are factory defined and are used to differentiate the devices (the FF-800 does not have

any specific programming that differentiates one address from another). The DVR address is 6, so

the FF-800 commands for accessing the DVR are the SPI #6 Command (default 130) or the

generic SPI Command plus the address "6" (default 1266). One of these prefixes must precede

the DVR commands described herein. Note that these prefixes are defined using the FF-800, not

FF-8070 commands. If they have been modified for your system, you must use the new prefix

when entering DVR commands into your system (all examples illustrate the default prefix codes).

The suffix codes form the "tail end" of the DVR command syntax. These are the DTMF digits that

specify which DVR command is to be executed and may include one or more digits of user

specified data. In addition, four of these suffix codes can be user defined as shown below.

User Defined suffixes: Factory Default

Record mail slot *

Erase last played mail slot **

Audio Test ***

List active Mail Slots blank (no digits)

The following list describes the FF-8070 command suffixes. These commands are used to set

system parameters or record system tracks. NOTE: all DVR command digits must be preceded by

a FF-800 SPI prefix digits:

suffix code DESCRIPTION

00 Play system track

01 Record system track.

01* Interrogate system track size.

02 Set input source. Selects main or aux. (phone patch) DVR input.

03* System track erase.

040 Search system track -- short play.

041 Search system track -- long play.

050 lopoff (start) configure.

051 End lopoff (end) configure.

052 Set number of installed DRAMs.

053 Set number of mailbox tracks.

054 Set "Audio Test" suffix.

055 Set "List active slots" suffix

056 Set "Record mail" suffix

057 Set "Erase last played" suffix

0580 Set Voice Mail Auto-play delay time.

0581800 Clear user defined suffixes

0582 Set Voice Mail Auto-erase time.

059 Blank annunciate mode.

05* Set Security code.

060800 Execute BASIC initialization.

061 ADVANCED initialization code.

066 Force mail box message erase

067800 Save configuration flag modes.

069 Set track interrupt mode.

07 Record system track with no play-back

08 Version request. Responds with the interface model and serial number.

09 Security lock/unlock

User Commands

Input Source Set Sets source of record audio to the DVR (main or aux)

<spi prefix> + <02> ; <1 or 2> 1 = main, 2 = aux

default 13002 interrogate

The auxiliary DVR input is intended for use by the FF-800 control autopatch. This signal is available on

the FF-800 P20. When executing this command, the DVR response will be "In A" if the selected input

source is main, or "In B" if auxiliary. As long as the input source = aux, the normal COS detection for the

DVR is suspended and the DVR looks for a DTMF digit to simulate a COS signal. Any time the DVR

would normally look for a COS, it will now look for any DTMF digit. Recording starts as soon as the

digit is released. Loss of COS is simulated by another DTMF DIGIT (again, it may be any digit) and

recording stops as soon as the digit is detected. Also, as long as source = aux, a DTMF digit press will

interrupt any playback in progress. If no record or playback command is received for 5 minutes, the

source will automatically revert to main. The letter "B" is appended to the "DVR" and "Test" prompts for

the Record system track, and Audio Test functions when source = aux.

Audio Test Record and play-back test track.

default 130***

This function waits for a COS signal (or any DTMF digit if input = aux.) to begin recording on the

test track. After the loss of COS (or another DTMF digit, if input = aux.), the test track is played

back. The maximum record time for the test track is 20 seconds. There is a time-out limit of 5

seconds after the command entry -- if no COS is engaged within this time, the record operation is

aborted.

Voice Mail Send, Receive, or List voice mail tracks.

List active mail slots <spi prefix> + <List active Mail Slots>

default 130

Record new mail <spi prefix> + <Record mail slot>

default 130*

Erase last-played slot <spi prefix> + <Erase last played mail slot>

default 130**

Play mail slot <spi prefix> + <slot#>

default 130n

There are two parts to a voice mail message, the first is the address header and the second is the

voice message itself. The address header is a brief description of to whom the message is intended

(i.e., the person's call sign, or "TO ALL HAMS", etc...). The maximum time for a mail track is

20 seconds which includes the message and address. The DVR uses system tracks 00 through 06

to prompt the entry of voice mail. If any of these tracks are empty, the FF-8070 will respond "M

P" (Mail Prompt) and the track number for the particular prompt in question. The following list

describes these special system track numbers and their prompt function:

SYS TRACK # Track function: Examples:

• Track 00 message address prompt "Who is your message for"

• Track 01 record prompt "Record your message"

• Track 02 messages waiting "There are voice messages"

• Track 03 no messages "Sorry, there are no messages"

• Track 04 message clear "Your message has been erased"

• Track 05 message saved "Your message has been saved"

• Track 06 mailbox full "Sorry, the mailbox is full"

These tracks should be recorded after each cold-start (a cold start is when the DVR is powered on

after a full power loss). Note that any DVR recording will be lost if the DVR looses power at both

the normal and battery power connections. The mailbox function will still operate even if these

tracks are not recorded, but the prompting will not be informative to those who are not familiar

with the mail slot recording process.

After entering the record voice mail command, the DVR responds with track#00 ("who..."). The

user simply keys their transceiver, speaks an appropriate address, and then releases their push to

talk. The DVR then responds with track#01 ("record...") at which time the user keys again and

records their message. After the message is recorded (PTT released) the DVR responds with

track#05 ("message saved..."). The record cycle is now complete and the message can be

retrieved at any time by the addressee.

If all the available voice mail message slots are in use, the DVR will respond with track#06

("full...") instead of track#00. If this occurs, no more messages can be stored until one or more of

the active messages is erased. Also, there is a time-out limit of 5 seconds after each prompt -- if

no COS is engaged within this time, the mailbox operation is aborted.

To query the mail box, the "list active messages" command is entered. If there are no active

messages, the DVR responds with track#03 ("no messages..."). If one or more active messages

are present, the DVR reads back the slot number followed by the address header for each active

message. The slot number of the message headers is important in that this corresponds to the

number entered to retrieve the message track. NOTE: The DVR does not count inactive messages

during the list operation. This means that if a message is deleted, any active message numbers that

follow it will be decremented by one on subsequent list queries. Thus, a message track may start

at slot number 3, but end up at slot number 1 if the previous two messages are deleted (and no

other slots are recorded).

When the play message slot function is entered, the DVR looks for the n-th active message. If

active, the header and message are played-back. After the playback is complete, a 60 second timer

is activated during which the message erase function can be entered to clear the message track. If

the erase is successful, the DVR responds with track#04 ("message clear..."). If there is no

response to the erase command, then the erase was not successful.

Version Interrogate the FF-8070 software version.

default 13008

Responds with the interface software revision and serial numbers. This command is useful to

verify that the interface communications are functioning properly. The FF-800 Version

Interrogate command (01800) will also interrogate the FF-8070 version and serial numbers.

Security Security access command

<spi prefix> + <09> ; <nnn> Unlock security access

default 13009 lock access

13009nnn unlock

This command must be entered prior to accessing the configuration commands if a security code has been

programmed. Entering the prefix with out the code, or with an invalid code, will lock the system (which

should be done after a configuration session is complete). The security access automatically expires 15

minutes after the last entry of a configuration command. It should be noted that this command is totally

unrelated to the FF-800 security commands. NOTE: If the security prefix is set to blank (no prefix), then

security is ALWAYS unlocked, and this command has no affect on the status of security. The factory

default is a blank security code.

Configuration Commands

NOTE: All configuration commands require that the DVR security be unlocked or disabled.

Set security code <spi prefix> + <05*d..d>

default 13005*d..d

response: "P F X" if new prefix is OK

"Abort" if new prefix is a duplicate of an existing prefix or if CMD unlock jumper

removed.

The security code "d..d" can be between 0 (blank) and 3 digits long. Zero digits for "d..d" disables the

security feature (this is the factory default). Note that the CMD unlock jumper (P3) must be installed to set

the security code.

Record system track <spi prefix> + <01nn> Record track #<nn>

<spi prefix> + <01*nn> Interrogate track length

<spi prefix> + <07nn> Record (no play-back)

default 13001nn record

13001*nn interrogate track length

13007nn record w/ no play-back

The record time of the new track can not exceed the allocated time or an error message will result

and the original track will be lost -- refer to appendix B for a listing of the BASIC initialization

allocations. The <01*nn> format allows the user to interrogate the amount of time allocated to the

indicated track. The response is in seconds and provides the user with a means to interrogate the

maximum length allocation for any track. The record protocol is as follows:

• Enter 13001nn (nn = track# to record) and wait for the "DVR" response from the

FF-8070(or "DVR B" if source = auxiliary) -- the DVR waits for a

COS signal (or any DTMF digit if input=B) at which point the recording

operation begins.

• Recording continues until the loss of COR (or any DTMF digit if input=B) or until

the end of track is reached. There is no alert for end of track over-run.

• After the record operation, the track is played back and the record cycle is complete

(this step is skipped for the no play-back command).

There is a time-out limit of 5 seconds after the "DVR" response -- if COS (or DTMF digit if

input=B) is not engaged within this time, the record operation is aborted with no change to the

original track.

System track erase <spi prefix> + <03*nn>

default 13003*nn

Erases the system track# <nn> from the system. It is not necessary to erase a system message

before rerecording.

Force Mail Erase <spi prefix> + <066nn> Erase Mail box Track(s)

default 130066nn

Forces an erase of mail box message track number <nn> without having to interrogate the contents

of the mailbox slot. If there are not <nn> active messages, this command is ignored. If <nn> =

"0", all of the active messages are erased (leaving the mail box completely empty).

Play system track Play system track.

<spi prefix> + <00nn> Play track number "nn"

<spi prefix> + <041> ; <nn> Search tracks starting at track# "nn"

<spi prefix> + <040> ; <nn> Search tracks -- short play version

default 13000nn Play track

130040nn Search tracks, short

130041nn Search tracks

The search tracks formats are used to sequentially play a range of system tracks. The DVR starts at

track# <nn> (or track# 00 if <nn> is omitted) and sends the track number followed by a playback

of the track for each of the remaining tracks. This format is useful for locating a track if the

number has been forgotten. The search continues until a COS is detected or until the last recorded

track is encountered (blank tracks are skipped). The search long function plays each track in its

entirety, while the search short only plays the first 1 second of each track.

LOPSTART A <spi prefix> + <050> ; <nnn> Start lop-off: input A (milliseconds)

LOPEND A <spi prefix> + <051> ; <nnn> Stop lop-off: input A (milliseconds)

LOPSTART B <spi prefix> + <050*> ; <nnn> Start lop-off: input B (milliseconds)

LOPEND B <spi prefix> + <051*> ; <nnn> Stop lop-off: input B (milliseconds)

default 130050nnn Start, input A

130051nnn Stop, input A

130050*nnn Start, input B

130051*nnn Stop, input B

The "lop-off" values are the amount of time that subtracted from the beginning or end of each

recorded track. This allows the elimination of switching and squelch noise from the beginning

and/or end of tracks which gives a "clean finish" to the DVR tracks. If the system has a long

squelch burst, or some other artifact that is heard at the beginning and/or end of a recorded track,

then these values may be increased to remove the particular artifact. NOTE: it is not necessary to

rerecord tracks for new lop-off values to take affect, this value is used in play-back only, so the

values may be changed any number of times without altering the original track recordings.

LOPSTART A and LOPEND A affect all tracks recorded from the "A" input while

LOPSTART B and LOPEND B affect all tracks recorded from the "B" input. The Audio Test

track does not use the lop-off functions, so squelch noises or DTMF "blips" observed on this track

are normal.

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