GENERAL DESCRIPTION
1.1 MODELS 5100 AND 5110
Models5100 and 5110Programmable Frequency Syn-
thesizers provide spectrally pureoutputfrequencies in
0.001 Hzsteps from DCto
2
MHz. Model5100 may be
programmedlocallyand remotely.Model5110mayonly
be programmed remotely.
A patented* direct digital synthesis technique is used
togenerate theoutputfrequency directlyfrom aninter-
nalcrystal reference,which maybephase lockedtoan
external 1 MHz standard, if desired.
Inaddition to excellent short term stability, digital syn-
thesis also provides other improvements in perf0.t-m-
ance. Digitaloperation means inherent programmabil-
ityandvery fast switching. Inbinarywordformat,these
models maintain
amplitude and phase continuity in
switchingbetween any twofrequencies
(i.e.,noswitch-
ing transient) with a programming delay of only 1.5ps
beforeswitching.Thus,linearfrequencysweepingorfre-
quency hopping (including FSK signaling) are easily
programmed.
Excellent spectral purity is also possible with digital
synthesis sinceoutput distortion isdetermined entirely
by the number of bits per sample and the linearity of
the DIA converter. Another feature of digital synthesis
istheabilitytopreciselycontrolthephaseof the output
frequency.The phase may be asynchronously reset to
zero at any time for as long as desired (or as little as
125ns).Hence,for example,sinusoidalburstsareeasily
produced with each burst beginning at exactly zero
phase.
1.2 SPECIFICATIONS
1.2.1 Frequency
Range
0.001 Hz to 2,000,000.000 Hz.
0.001 Hz to 3,000,000.000 Hz (Option 013).
Resolution
0.001 Hz throughout entire range.
Control
Local (Model 5100 Only):
Ten 10-position rotary
switches.
Remote:
31 bits in binary or 37 bits in BCD format.
*U.S.
Patent
3,735,269
1.2.2 Frequency References
Model 5100
Internal (8 MHz Crystal):
Standard:TCXO(SameasOption006for Model5110).
Option 001
:
High Stability (Oven Controlled).
External, Rear Panel REF
IN
(TTL Level, Schmitt-
Trigger Conditioned Input,
1
TTL Load):
1MHzReference:Phaselockstostandardor optional
internal reference.
8
MHz Reference: Replaces internal
8
MHz crystal
reference.
Model 5110
Internal (8 MHz Crystal):
Option 001
:
High Stability (Oven Controlled).
Option 006: TCXO.
External, Rear Panel REF IN (TTL Level, Schmitt-
Trigger Conditioned Input, 1 TTL Load):
1 MHz Reference: Phase locks to optional internal
reference.
8
MHz Reference: Replaces internal 8 MHz crystal
reference. Required for units without an internal
reference.
1.2.3 Output Amplitudes
Model 5100
FixedOutput:
1Vp-p noload,0.5 Vp-pinto509.Front
panel (1 VOLT
P-P),
rear panel (FXD OUT).
Variable Output:
10Vp-p no load(max),5 Vp-p into
50R (max). Front panel (OUTPUT), rear panel (VAR
OUT).
Model 5110
Fixed Output:
1 Vrms no load, 0.5 Vrms into 50R.
Front panel (OUTPUT 50R), rear panel (FXD OUT).
Option004:
Replaces1Vrms(noload)signalat fixed
output with 10Vp-p signal.
Models 5100 and 5110
Frequency Response(Full Output):
NoLoad:dcto500kHz,
+
0.25dB;500kHzto
2
MHz
(3
MHz with Option 013),
2
0.5 dB.
5052 Load:dcto500kHz,
&
0.25dB;500kHzto2MHz
(3 MHz with Option 013),
+
0.5 to
-
2.5 dB.
Reference Output:
1 MHz square wave or
8
MHz
pulseat
TTL
levels.Capableof driving 30
TTL
loads.
Rear panel (REF OUT).
