Sig Id Oscillator (Option 008) - Agilent Technologies 8564EC Service Manual

8. On the spectrum analyzer, press
Set the oscilloscope for the following settings:
Amplitude scale ........................................................... 2 V/div
Sweep time .............................................................. 20 ms/div
9. The waveform should be at a TTL high during part of the retrace
period and a TTL low during the sweep (about 50 ms).

SIG ID Oscillator (Option 008)

Refer to function block F on A15 RF Section Schematic Diagram in the
8560 E-Series Spectrum Analyzer Component Level Information.
SIG ID is available only with Option 008. The SIG ID Oscillator
provides a shifted third LO (approximately 298 MHz) to distinguish
true signals from false signals (such as image or multiple responses).
When the spectrum analyzer is set to
turns on during alternate sweeps.
1. Set the spectrum analyzer to the following settings:
Trigger ............................................................ single sweep
SIG ID .............................................................................. on
2. Use an active probe with a second spectrum analyzer to measure the
signal level at A15X602.
3. On the spectrum analyzer, press
, the analyzer alternates between the following two states:
SGL SWP
State 1:
A15J901 pin 13 (LSID)....................................... TTL low
SIG ID Oscillator ........................................................ ON
Signal at A15X602..298MHz ±50 kHz (at least +1 dBm)
State 1:
A15J901 pin 13 (LSID)......................................TTL high
SIG ID Oscillator .......................................................OFF
3rd LO Driver Amplifier .... Provides LO for Double Balanced Mixer
4. With the SIG ID oscillator on, measure the frequency at A15X602
with a frequency counter and an active probe. If the frequency is not
298 MHz ±50 kHz, refer to the
(serial prefix 3517A and below)" on page
adjustment for instruments with A15 RF assembly 08563-60084 or
greater.)
Chapter 12
and set the
PRESET
, the SIG ID Oscillator
SIG ID ON
. With each press of
SGL SWP
"14. Signal ID Oscillator Adjustment
151. (There is no
RF Section
A15 RF Assembly
to 1 MHz.
SPAN
625