HP 8756A - Page 42

Model 8756A Operating Information
Presets conditions on the 8756A and the
8756 SYSTEM INTERFACE. A self test of the
8756A is first performed, indicated by the
lighting of all LED's on the front panel
and clearing of the CRT display. Then the
following actions take place:
1. Both Channels turned ON:
a. MEAS PWR A on Channel 1.
b. MEAS PWR B on Channel 2.
c. DISPLAY MEAS.
d. SCALE 20 dB/div.
e. REF LEVEL 0 dB for all DISPLAY's
(MEAS, MEM, M-MEM).
f. AVERAGING OFF
g. AVERAGING FACTOR = 8.
h. CURSOR OFF.
i. LABELS ON.
j. MAIN MENU soft keys.
k. Channel 1 set as ACTIVE channel.
m. Modulation drive ON.
2. When the 8350B Sweep Oscillator or 8340A Synthesized Sweeper
HP-IB (address 19) is connected to the 8756 SYSTEM INTERFACE,
the following actions are performed on that source:
a. Instrument Preset.
b. Sweep time set to 200 ms.
c. 8350B Square wave modulation ON; RF Output ON/OFF
depending on plug-in internal switch setting.
d. 8340A PULSE Modulation Input ON; RF Output ON.
3. If a 9872C or 7470A Plotter (HP-IB address set to 05 decimal) is
connected to the 8756 SYSTEM INTERFACE, the following actions
are performed on the plotter:
a. Abort plot if in progress.
b. Return pen to holder.
c. The position of Pl and P2 are left unchanged.
d. Default conditions for other features.
Figure 3-1. Front Panel Operating Features (9 of 11)
3-11