Features
- Transmitter frequency range: 20 Hz to 110 kHzReceiver range: -60 dBm to +13 dBmReceiver noise
- Message circuit noise: 10 to 90 dBrn
- Noise-with-tone: 10 to 90 dBrn
- Noise-to-ground: 40 to 130 dBrn
- Signal-to-noise ratio: 10 to 45 dB
- Noise filters: C-Mess, 3kHz, 15kHz, Program, 50 kbit
- Notch filter: 50 dB rejection from 995 to 1025 Hz
- Peak to average ratio range
- Transmitter/receiver range: -40 to 0 dBm0 to 120 P/AR units
- Impulse noise range
- Low: 30 to 110 dBrn
- Mid: 2, 3, 4, or 6 dB above low
- High: 2, 3, 4, or 6 dB above Mid
- Phase hits thresholds: 5° to 45°Gains hits threshold: 20 to 10 dBDrop outs threshold: -12 dBEnvelope delay
- Transmitter: -40 to 0 dBm level range, 83? Hz modulation
- Receiver: -40 to +10 dBm level range
The HP 4945A transmission impairment measuring set provides the complete set of measurements needed to quickly isolate faults and qualify circuits for voice, data, or broadcast transmission up to 110 kHz. All measurements are compatible with Bell standards including the ability to test local distribution loops for Dataphone Digital Service (DDS) to 56 kbps.
| Manufacturer | Agilent, HP, Keysight |
|---|---|
| Condition | Used |
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