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Model 8690B
8699B SUPPLEMENTAL OPERATING
INFORMATION
REMOTE PROGRAMMING: For digital programming
of CW frequency, a special version of the 8690B Sweep
Oscillator is available (8690B Opt. H26) that incorpo-
rates a Digital-to-Analog converter and accepts 12-line
BCD input.
MULTIBAND OPERATION: When the 8699B is in-
stalled in an RF Unit Holder (HP 8707 A) and the HP
8706A Control Unit is used, the frequency range of
operation must be selected manually with the switch
on the front panel of the 8699B. To switch ranges re-
motely, use a modified Control Unit (8706A Opt. H25).
LEVELING: With a directional coupler and crystal
detector, the power variations across the frequency
band of interest will depend primarily on the frequency
REAR PANEL CONNECTIONS
•
EXT ALC GAIN:
Adjust ALC gain for optimum leveling across the band.
C)
SWEEP REFERENCE OUTPUT:
Voltage output proportional to RF frequency. Approxi-
mately 0 to +40 V output on 2 to 4 GHz range only
(compatible with HP 8410A Network Analyzer). There
is no output on the 0.1 to 2 GHz range.
response of the coupler and detector used. An alterna-
tive scheme, useful in the frequency range of the 8699B,
is to use a power splitter instead of a coupler to sample
RF power. With this technique, the maximum leveled
power available at the output will be lower, but overall
flatness will be improved.
EXTERNAL FM: Modulating signals may be applied
to either the front panel EXT FM input on the 8690B
Sweep Oscillator (with the SWEEP SELECTOR in
MANUAL) or to the rear panel PHASE LOCK input of
the 8699B. For best performance, the latter technique
should be used. The front panel EXT FM input should
be used mainly for remote frequency control or for
modulation at wide deviations and very low rates
(<1 kHz).
•
REMOTE RANGE SELECT:
Permits remote range selection by a contact closure to
ground. A 3-prong phone plug inserted into this rear
panel input will disable the MANUAL range switch on
the front panel. For 0.1 to 2 GHz, the plug tip is
grounded; for 2 to 4 GHz, the tip is opened.
G
PHASE LOCK INPUT:
Input terminal for phase-locking control voltage or ex-
ternal FM signal. For phase-locking, the input sensi-
tivity of 1 MHz/volt is compatible with the HP 8709A
Synchronizer. For FM modulation, Figure 8 shows the
maximum deviation that typically results when the in-
put level is held constant and the modulation rate is
varied.
:!:30
N
J:
::2
z
0
[i
>
w
0
X
<!
::1:
::!:3
±I
1.0
MODULATION RATE (KHz)
Figure 8
For more information, call your local HP Sales Office or East {201) 265-5000
•
Midwest (312)
677-0400
•
South
(404) 436-6181
West (213) 877-1282. Or, write: Hewlett-Packard, 1501 Page Mill Road, Palo Alto, California 94304. In Europe, 1217 Meyrin-Geneva
5952-0936
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