The Keysight (Agilent HP) 8657D is a dedicated RF signal generator designed for testing mobile communication systems under the North American Digital Cellular (NADC) and Japanese Digital Cellular (PDC) standards. Operating across an analog carrier frequency range of 100 kHz to 1030 MHz, the 8657D adds high-accuracy Pi/4 DQPSK digital modulation with an error vector magnitude of less than 3.2% while retaining standard AM, FM, and pulse modulation capabilities. Its exceptional spectral purity and level accuracy make it a staple for receiver characterization.
Specifications
Frequency
| Parameter | Value |
|---|---|
| Minimum Frequency | 100 kHz |
| Maximum Frequency | 1030 MHz |
Output
| Parameter | Value |
|---|---|
| Maximum Output Power | +13 dBm |
| Output Power Range | +13 to -143.5 dBm |
| Phase Noise | <-130 dBc/Hz (at 20 kHz offset, 500 MHz carrier) |
General
| Parameter | Value |
|---|---|
| Reference Oscillator | 10 MHz |
| Interfaces | GPIB (IEEE-488) |
Frequency Characteristics
| Parameter | Value |
|---|---|
| Frequency Range | 100 kHz to 1030 MHz |
| Internal Reference Frequency | 10 MHz |
Digital & IQ Modulation
| Parameter | Value |
|---|---|
| Target Standards Support | NADC (North American Digital Cellular), PDC (Japanese Digital Cellular) |
Amplitude & Output Power
| Parameter | Value |
|---|---|
| Amplitude Range | +13 to -143.5 dBm |
| Amplitude Resolution | 0.1 dB |
| Reverse Power Protection (RF) | 50 W (from 50 ohm source, DC to 1030 MHz) |
| Output Impedance | 50 ohms |
Spectral Purity
| Parameter | Value |
|---|---|
| SSB Phase Noise | <-130 dBc/Hz (at 20 kHz offset, 500 MHz carrier) |
Analog Modulation
| Parameter | Value |
|---|---|
| AM Depth Range | 0 to 99% (output levels <= +7 dBm) |
| AM Resolution | 1% |
| FM Deviation Range | Up to 99 kHz (carrier frequency dependent) |
Internal Modulation Source
| Parameter | Value |
|---|---|
| Modulation Waveforms | Sine |
| Modulation Frequencies | 400 Hz, 1000 Hz |
Connectivity & Rear Panel Interfaces
| Parameter | Value |
|---|---|
| RF Output Connector | Type-N female |
| GPIB Interface | IEEE-488 |
Programming & Control
| Parameter | Value |
|---|---|
| Save/Recall Memory | 100 non-volatile registers |
Modulation Source
| Parameter | Value |
|---|---|
| Internal Modulation Frequencies | 400 Hz and 1 kHz |
| External Modulation Input Impedance | 600 Ω |
| External Modulation Input Level | 1 Vpk for specified depth or deviation |
Compliance
| Parameter | Value |
|---|---|
| EMI / RFI Compliance | MIL-STD-461B RE02 and FTZ 1115 |
Technology
RF Signal Generator
Applications
NADC and PDC Mobile Communication Testing