Section VIII
TM 11-6625-2781-14&P-2
SECTION VIII
SERVICE
through a variable auto transformer. The line voltage to
8-1. INTRODUCTION
the Spectrum Analyzer may then be adjusted to check
regulator action when the line voltage varies as much as
8-2.
This section prov ides instructions for
10%.
troubleshooting and repair of the HP 8553B Spectrum
Analyzer RF Section.
8-5. MAINTENANCE AIDS
8-3. LINE VOLTAGE REQUIREMENTS
8-6. Servicing Aids on Printed Circuit Boards .
Serv icing aids prov ided on circuit boards include holes
8-4. During adjustment and testing, the Spectrum
to fit the board removal tool, numbered test points (on
Analyzer must be connected to a source of power which
some boards), transistor designators, adjustment
is 50 to 60 Hz and 115 or 230 Vac +10%. If adjustment
callouts, and assembly stock numbers.
of the dc voltage regulators is necessary, the Spectrum
Analyzer should be connected to the ac power source
Table 8-1. Test Equipment and Accessories List
Item
Critical Specifications
Model Number
Variable Voltage
Range: 103-127 Vac
General Radio W5MT3A
Voltmeter Range: 103-127 Vac -1 volt
or Superior Electric UC1M
Tuneable RF
Bandwidth: 1 kHz; Frequency Range: 1-310 MHz;
HP 8405A Vector
Voltmeter
Sensitiv ity: 10 mV to 1V rms;
Voltmeter
Input Impedance ≥ 0.1 megohms
Resistance Ranges: 1 ohm to 100 megohms
HP 410C Volt-ohm-
Accuracy: 10% of reading
HF Signal
Frequency Range: 1-50 MHz; Output Amplitude: -20 dBm;
HP 606B HF Signal
Output Amplitude Accuracy: 1%; Freq. Accuracy: 1%;
Output Impedance: 50 ohms
Frequency Range: 10 -310 MHz; Frequency Accuracy: 1%;
VHF Signal
HP 608F VHF Signal
Output Amplitude > -20 dBm
Output Impedance: 50 ohms
Frequency Range: dc to 50 MHz; Time Base: 1 s/Div to 10
HP 180A with HP 1801A
ms/Div; Time Base Accuracy: 3%; Dual Channel, Alternate
Vertical Amplifier, and
Operation, ac or dc coupling; External Sweep Mode; Voltage
HP 1821A Horizontal
Accuracy Sensitiv ity: 0.005V/Div
Amplifier
Voltage Accuracy: 0.2%;
Digital
HP 3440A Digital
Voltmeter
Voltage Range: 1-50 Vdc full scale;
Voltmeter with
Input Impedance: 10 megohms
HP 3443A Plug-in
Frequency Range: 3-310 MHz; Accuracy: 0.001%;
Frequency
HP 5245L Frequency
Counter
Sensitiv ity: 100 mV rms;
Counter with
Readout Digits: ≥ 7 digits
HP 5252A Plug-in
Serv ice Kit
Dev ices required to serv ice the Analyzer
HP 11592A
50-ohm Tee
Type N female connectors on two ports, with the third port able
HP 11536A 50-ohm Tee
to accept HP 8405 probe.
BNC Tee
Two BNC Female Connectors, One Male BNC Connector.
UG-274 B/U, HP 1250-0781
8-1
