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21-52.
Measurements. To obtain correct monitor mode data it is necessary to first set the frequency,
bandwidth, and image prior to making the reading. Thus, it is a good practice to always place the request for a
reading as the last command in the string. For example the command string:
CMRNRHGF95.5RET
selects the monitor mode, narrowband, high image, and 95.5 MHz center frequency. The 'RET' command asks
for a frequency error reading and triggers the analyzer so that the reading will be made.
21-53.
General.
Overall, programming the analyzer involves the same steps as are involved when using it
manually. A program can be fairly easily obtained by first performing the desired test sequence manually
noting each time a setting is changed and
a
reading made. The program is then simply a duplication of the
manual steps with control commands substituted.
21-54.
R2002B Analyzer Configuration
The R20028 analyzer differs in configuration from the standard R2001 8 in the following manner:
A11 Module:
The manual attenuator AT1 is replaced with a programmable version (PIN RTL-4064A) A
new ribbon cable assembly connected to the AS module provides control signals for the attenuator. The
module is reidentified for ordering purposes as RTC-10038.
A9
Module:
Additional memory for the IEEE program is added by adding U36 (E-PROM TMS 25L32).
Front Panel Assembly A 14: Rotary switch 819 is added for control of the RF lnput!Outputlevel. The switch
P /N is 40-P04127T001.
Module AS is added to the analyzer (see Section 14 for details). Ribbon cable assembly 30-P04147T001 is
added from the AS module to the rear panel of the analyzer to provide
1/0 signals.
21-12
r
L
I .
L
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