Panel Features; Operator's Checks; Operating Instructions; Front Panel Freq Cal - HP 83522A Service Notes

Opera tion Model 83522A
CW/CF
-
4096
+I28 Vernier Points
Vernier
-
256
b
-1 28 Vernier Points
10 Bits
AF-
1024
f 8
Figure 3-1. Simplified Tuning Voltage Block Diagram
3-9. The AF DAC has 10 bits (1024 points).
The analog output from this DAC ranges from
-5 to +5 volts to produce an even sweep on
either side of the center frequency. The AF
resolution improves with narrower sweep
widths. For broad sweeps, the resolution is 0.1%
of the full band. For sweep widths less than 118,
but greater than 1/64 of the full band range, the
resolution is improved to 0.012% of the full
band. For sweep widths less than 1/64 of the full
band range, the resolution is improved to
0.0015% of the full band.
3- 10. Center Frequency is always displayed
with 1 MHz resolution. Likewise, Vernier values
are always displayed at 10 kHz resolution.
Display resolutions for AF values vary with
sweep width. Figure 3-2. illustrates the A F mode
displayed resolution values versus displayed AF
frequency sweep widths.
3-1 3. OPERATOR'S CHECKS
3-14. The Operator's Checks (local and
remote) in the 8350A Sweep Oscillator manual
provide a quick evaluation of 8350A and 83522A
main functions. Error codes 50 to 99 indicate
plug-in related problems. The 8350A Local
Check covers the sweep oscillator and R F plug-
in, therefore, if the correct indications are not
obtained, trouble may be in either of the units. If
the RF plug-in is suspected, follow the trouble-
shooting information in Section VIII, Service, in
this manual to isolate the problem.
3-1 5. OPERATING INSTRUCTIONS
3-1 6. Front Panel FREQ CAL
3-1 1. PANEL FEATURES NOTE
3-12. Front and rear panel features are
The 8352249 RF Plug-in may not meet the
described in Figure 3-3 and 3-4, respectively.
frequency accuracy specifications unless
Description numbers match the numbers on the
the front panel FREQ CAL (frequency
illustration.
calibration) procedure is performed.