HP (Hewlett-Packard) TM 11-6625-2779-14&P ユーザーズマニュアル

Section I

Model 3555B

balanced and 75 ohms unbalanced.

Return loss: TERM ONLY

600 ohms: 26dB min 3kHz to 150kHz

Range: -91dBm to +31dBm

135 ohms: 26dB min to 600kHz
75 ohms: 30dB min to 3MHz

Level accuracy: 20Hz to 20kHz: +0.5dB

Bridging loss: less than 0.05dB at 10kHz

40Hz to 15kHz: +-0.2dB

Balance:

(Levels greater than -60dBm)

greater than 70dB to 10kHz

Note: For levels greater than +1 dBm, level accuracy

greater than 60dB to 100kHz

greater than 40dB to 600kHz

Input: will terminate or bridge 600 ohms or 900 ohms

Temperature range: 0°F to 120°F 0 to 95% relative

balanced.

humidity

Bridging loss: less than 0.3 dB at 1kHz.

The 3555B will operate at -40°F under reduced

Return loss: 30dB min.  (50Hz to 20kHz) TERM 

specifications.  At this temperature, attention

Return loss: 30dB min.  (50Hz to 2kHz) TERM

should be given to noting condition of battery as

only.

indicated on Battery Test (DIAL/BAT).

Balance:

greater than 80dB at 60Hz

Meter: linear dB scale indicates rms value of input

greater than 70dB to 6kHz

signal.  12dB range.

greater than 50dB to 20kHz

Holding circuit: 700 ohms dc resistance, 60mA

Normal: 200ms to indicate a reading to 0dBm on

max. loop current at 300Hz.  With holding circuit

meter.

in, above specs apply from 300Hz to 4kHz.

Damp: 500ms to indicate a reading to 0dBm on

meter.

Range: -1 dBm to +121dBm

Tip to ring: 150V peak
Tip or ring to ground: 500V peak

Weighting filters: 3kHz flat, 15kHz flat, C-message, and

(This is maximum instantaneous voltage.  Input

program.  Meets joint requirements of Edison

circuit will withstand 48V dc CO battery with

Electric Institute and Bell Telephone System.

superimposed 90V rms 20Hz ringing voltage or

±

130V carrier supply.)

Input: same as for level measurements.

Maximum longitudinal voltage:  200V rms at 60Hz

80 kilohms across line

AC Monitor:  0.27V rms for 0dBm on meter.

100 kilohms to ground

R

out

 = 8 kilohms.  Available at DIAL/AC MON

-40dB relative to 600 ohms noise metallic at

jacks.  Sufficient to drive WE 1011B or 52 type

1kHz.

headset.

DC Monitor: 1 volt for 0dBm on meter.  R

out

 = 2

kilohms.  Jack accepts 310 plug (tip negative).

Input jacks: will accept Western Electric (WE) 241,

Range:  -61dBm to +11dBm

309, 310, 358 plugs.  Binding posts accept banana
plugs, spade lugs, phone tips or bare wires.

Removable shorting bar between sleeve and

600 ohms balanced

ground binding posts.

1kHz to 150kHz: 

±

0.5dB

Dial/AC Monitor jacks: will accept WE 289, 310, 347

135 ohms balanced (or 150 ohms balanced)

plugs.  Accepts WE 1011B lineman's handset or

1kHz to 600kHz: 

±

0.5dB

52 type headset.

10kHz to 300kHz: 

±

0.2dB

75 ohms unbalanced

100Hz to 600kHz: 

±

0.2dB

Internal battery: single NEDA 202 45V "B"

30Hz to 1MHz: 

±

0.5dB

battery included.  Expected battery life - 180

1MHz to 3MHz: 

±

0.5dB ±10% of meter reading

hours at 4 hours per day at 70° F.

in dBm.

AC: 115V or 230V, 48-440Hz, <1W
External battery: 24V or 48V office battery; jack

Input: will terminate or bridge 600 ohms or 135 ohms

accepts 310 plug (tip negative) less than 15mA.