HP TM 11-6625-2779-14&P Manuel d'utilisateur télécharger pdf (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

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HP TM 11-6625-2779-14&P Manuel d'utilisateur Page 35

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