Keysight (Agilent)
Keysight (Agilent) E4437B
250kHz-4GHz RF Signal Generator
250 kHz to 4 GHz Frequency Range
-136 to +7 dBm Output Power
< -130 dBc/Hz at 1 GHz, 20 kHz offset (-134 dBc/Hz typ.) SSB Phase Noise
AM, FM, ΦM, pulse, I/Q, wideband AM Modulation
±0.5 dB (spec.), ±0.9 dB above 2 GHz (spec.) at +7 to -120 dBm Level Accuracy

| Attribute | Value |
|---|---|
| Frequency Range | 250 kHz to 4 GHz |
| Output Power | -136 to +7 dBm |
| SSB Phase Noise | < -130 dBc/Hz at 1 GHz, 20 kHz offset (-134 dBc/Hz typ.) |
| Modulation | AM, FM, ΦM, pulse, I/Q, wideband AM |
| Level Accuracy | ±0.5 dB (spec.), ±0.9 dB above 2 GHz (spec.) at +7 to -120 dBm |
| Frequency Resolution | 0.01 Hz |
| Harmonics | < -30 dBc at ≤ +4 dBm |
| Switching Speed | < 65 ms (typ.) |
| Sweep Modes | step sweep, list mode (2 to 401 points) |
| Timebase Aging | < ±0.1 ppm per year |
| RF Output Connector | Type-N female, front panel |
| Interfaces | GPIB, RS-232 |
| Dimensions | 426 × 133 × 432 mm |
| Weight | < 13.5 kg |
Keysight Technologies E4437B Options:
- E4437B - OB0 - Deletes the standard manual set
- E4437B - OB1 - Adds extra manual set
- E4437B - OBV - Adds service documentation, component level
- E4437B - OBW - Adds service documentation, assembly level
- E4437B - OBX - Adds service documentation, assembly and component level
- E4437B - 1CM - Adds rack mount kit, part number 5063-9214
- E4437B - 1CN - Adds front handle kit, part number 5063-9227
- E4437B - 1CP - Adds rack mount kit with handles, part number 5063-9221
- E4437B - 1E5 - Adds high-stability timebase
- E4437B - 1E6 - High-performance pulse modulation
- E4437B - 1EM - Moves all front panel connectors to rear panel
- E4437B - UN5 - Adds multichannel CDMA personality
- E4437B - UN7 - Adds internal bit-error-rate analyzer
- E4437B - UN8 - Adds real-time I/Q baseband generator with TDMA standards and 1 Mbit of RAM
- E4437B - UN9 - Adds 7 Mbits of RAM to Option UN8
- E4437B - 100 - Adds multichannel W-CDMA personality
- E4437B - 101 - Adds multichannel cdma2000 personality
- E4437B - 300 - Basestation BERT extension for Option UN7 (internal bit-error-rate analyzer)
- E4437B - UNA - Alternate timeslot power level control
- E4437B - UNB - Adds higher power with mechanical attenuator
- E4437B - UND - Adds internal dual arbitrary waveform generator
- E4437B - H99 - Improves ACP performance for TETRA, CDMA, and W-CDMA
- E4437B - W50 - Adds additional warranty for a total of five years
The Keysight (Agilent) E4437B RF Signal Generator covers 250 kHz to 4 GHz with advanced phase noise and up to 35 MHz RF modulation bandwidth, ideal for R&D and manufacturing use.
It supports digital modulation formats including FSK, MSK, PSK, QAM, with optional waveform generators, 40 MHz sample rate, and 14-bit I/Q resolution.
Testwall can supply the used Keysight (Agilent) E4437B, fully tested. With expert support and global delivery, Testwall ensures high-performance instrumentation with unmatched reliability and service quality. Please contact us directly if you need calibration or repair of the Keysight (Agilent) E4437B.
Options and configurations
- Output Power: -136 to +7 dBm (+13 dBm with Opt. UNB; -4 dB with Opt. 1E6)
- Modulation: AM, FM, ΦM, pulse, I/Q, wideband AM; digital formats with Opt. UN8
- Harmonics: < -30 dBc at ≤ +4 dBm (+7.5 dBm with Opt. UNB)





