HP 8642A Operation And Calibration Manual

Operation
Model 8642A/B
~
Data Input (cont'd)
Valid
Character
Entry
3-14
Exceptions to Flow: harts
Not covered III those flowcharts is frequency sweep's dependence on entry
sequence Frequency sweeps are coupled to FM and <P\1 settings When selecting
either Digitally Stepped Frequency Sweep or Phase Continuous Frequency Sweep
with either FM or <PM, use the following sequence:
1. Turn off frequency sweep (FAOF FBOF).
2. Select either Special Function 123 (Phase Continuous Frequency Sweep) or
Special Function 223 (Phase Continuous Frequency Sweep Off which enables
the selection of Digitally Stepped Frequency Sweep).
3. If FM is to be selected, use the FM flow chart (but don't set FM yet, nor FR).
4. If <PM is to be selected, use the <PM flow chart (but don't set PM yet, nor FR).
5. With Start Frequency (FA) or Stop Frequency (FB) active, select the sweep
mode (FASA for auto, FASM for manual, or FASG for single).
6. Select the sweep time setting.
7. Select either the start or stop frequency setting. (Choose the frequency setting
that is in the band that allows the desired FM or <PM setting.)
8. Select the desired FM or <PM devia tion setting.
9. Select either the stop or start frequency setting (whichever of thes which was
not set in step 7.)
When entering data over HP-IB, the data entry can take the form of:
Implicit point nota t10n (for example, 100 MZ), or
Fixed point notation (for example, 100.0 MZ), or
Exponential notation (for example, 1 OOOE-j MZ).
Each function has an HP-IB data-entry limit of 10 mantissa digits and 2 exponential
digits (exponential notation is optional). For example, the following entries for lOO MHz
will be accepted:
1 OOOOOOOOOE-O 1 HZ
1 000000000E-1 HZ
1 OOOOOOOOOE-4 KZ
However, these entnes for 1 00 MHz will not be accepted:
1 (JOOOOOOOOOE-02 HZ (this entry will be accepted as 10 MHz)
llJOOOOOOOE-006
MZ (this entry won't be accepted and could cause problems in
Sll bseq HeIl t da ta en tries)
Only the following data inputs are recognized over HP- IB by the Signal Generator; all
other characters are ignored:
A-Z, a-z (lower-case letters are converted to upper case)
0-9
. +
Leading zeroes are treated as significant digits
The space character, carriage return, and line feed are ignored.

HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English