HP TM 11-6625-2779-14&P - Manual (Page 35)

Model 3555B Section V
SECTION V
MAINTENANCE
5-1. INTROOUCTION.
5-2. This section of the manual contains information
necessary in the maintenance of the -hp- Model 3555B
Transmission and Noise Measuring Set. Included are
performance checks, adjustment and calibration
procedures and troubleshooting.
5-3.
The test equipment needed to properly maintain
and service the Model 3555B is listed in Table 5-1.
Included in Table 5-1 is the equipment to be used,
required specifications 'and recommended model. If the
recommended model is not available other equipments
can be substituted provided they meet the required
specifications.
5-4.
FACTORY SELECTED VALUES.
5-5. Factory selected values are denoted on the
schematic diagrams by an asterisk. The nominal value
is shown. The value in your instrument may be different
or the part may be omitted.
5-6.
150 BAL CONVERSION.
a.
To convert the 135 BAL function to a 150
BAL
Table 5-1. Required Test Equipment
INSTRUMENT RECOMMENDED
TYPE REQUIRED CHARACTERISTICS MODEL
Oscillator Frequency Range: 20Hz to 3MHz -hp- 654A
Levels: -80dBm to +30dBm
Accuracy:
±
0.1 5dB
Oscillator Frequency Range: 100Hz to 20kHz -hp- 201 C
Amplitude: 30V
Transformer Line matching -hp- 11004A
Voltmeter, Function: AC and DC -hp- 3440A/3445A
digital Accuracy:
±
.1%
Amplifier Voltage gain: 20 dB -hp- 467A
Output: +/-20V peak at 0.5A peak
Voltmeter, AC Frequency Range: 20Hz-4MHz -hp- 400FL
Accuracy:
±
2%
Termination 50 ohms ±.25% -hp- 11048B
Termination 75 ohms ±.25% -hp- 11094A
Cables Balanced BNC to 310 plug See Figure 5-1.
Adapter BNC to 358 plug Trompeter Electronics
No. AD-1W
Resistors 576 ohms ±1% (1) -hp- Part No. 06984598
875 ohms ±1% (1) (Use 825 ohm, 0757-0731 and
49.9 ohm, 0698A4110 in series)
300 ohms 0.1 % (4) -hp- Part No. 0698-6295
600 ohms ±0.1% (4) -hp- Part No. 0698-7408
135 ohms ±0.1%(4) -hp- Part No. 0698-7364
75 ohms ±0.1% (4) -hp- Part No. 0698-7363
900 ohms
±
0.1% Use 600 and 300 in series (0.1%)
150 ohms
±
.1% (2) -hp- Part No. 0698-6774
100 kilohms 1% (1) -hp- Part No. 0757-0465
5-1