The Keysight 70310A (formerly HP / Agilent) is a 1-slot wide Modular Measurement System (MMS) precision frequency reference plug-in module. Designed to provide extremely stable 10 MHz and 100 MHz reference signals for HP/Agilent 70000 modular systems and other test setups, it features a high-stability internal ovenized crystal oscillator (OCXO) to improve overall system aging rate, frequency accuracy, and tuning efficiency. Option 002 is available to delete the internal OCXO for setups utilizing an existing house reference.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-MSIB, Front Panel BNC Connectors (10 MHz Out, 100 MHz Out, Ext Ref In) |
| Display | None (status LED indicators only) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered via Agilent 70001A mainframe backplane; auxiliary power pack for standby oven power during system shutdown |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 73.9 mm × 133.4 mm × 423 mm |
| Weight | 3.2 |
| MMS Slot Width | 1 slot |
Frequency & Output Specifications
| Parameter | Value |
|---|---|
| Primary Output Frequencies | 10 MHz and 100 MHz |
| Output Waveform Type | Sinewave |
| 10 MHz Output Level | ≥ +7 dBm into 50 Ω |
| 100 MHz Output Level | ≥ +7 dBm into 50 Ω |
| Output Impedance | 50 Ω |
| External Reference Input Frequencies | 1 MHz, 2 MHz, 5 MHz, or 10 MHz |
| External Reference Input Level | -10 to +20 dBm |
Frequency Stability & Accuracy
| Parameter | Value |
|---|---|
| Aging Rate (Daily) | < 5 × 10^-10 / day (after 24 hours of continuous operation) |
| Aging Rate (Yearly) | < 1 × 10^-7 / year |
| Temperature Stability | < 7 × 10^-9 over 0 °C to 55 °C |
| Warm-up Time to Rated Accuracy | Within 5 × 10^-9 of final frequency in 20 minutes (at 25 °C) |
| Retrace Stability | < 2 × 10^-9 (after 24-hour power cycle) |
Phase Noise
| Parameter | Value |
|---|---|
| 10 MHz Phase Noise @ 10 Hz | ≤ -120 dBc/Hz |
| 10 MHz Phase Noise @ 100 Hz | ≤ -140 dBc/Hz |
| 10 MHz Phase Noise @ 1 kHz | ≤ -150 dBc/Hz |
| 10 MHz Phase Noise @ 10 kHz | ≤ -155 dBc/Hz |
| 100 MHz Phase Noise @ 10 Hz | ≤ -90 dBc/Hz |
| 100 MHz Phase Noise @ 100 Hz | ≤ -120 dBc/Hz |
| 100 MHz Phase Noise @ 1 kHz | ≤ -135 dBc/Hz |
| 100 MHz Phase Noise @ 10 kHz | ≤ -145 dBc/Hz |
| 100 MHz Phase Noise @ 100 kHz | ≤ -145 dBc/Hz |
Physical & Configuration
| Parameter | Value |
|---|---|
| Form Factor | 1-slot wide MMS (Modular Measurement System) plug-in |
System Connectivity
| Parameter | Value |
|---|---|
| Control Interface | MSIB (Modular System Interface Bus) via MMS backplane |
External Reference Input
| Parameter | Value |
|---|---|
| External Reference Input Impedance | 50 Ω |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 to +75 °C |
| Operating Altitude | 4,600 m (15,000 ft) |
| Storage Altitude | 15,200 m (50,000 ft) |
Options
| Parameter | Value |
|---|---|
| Option 001 Description | Deletes the internal high-stability ovenized oscillator (requires external reference) |
Power
| Parameter | Value |
|---|---|
| +15 VDC Mainframe Current (Steady State) | 110 mA |
| +15 VDC Mainframe Current (Warm-up) | 410 mA |
| -15 VDC Mainframe Current | 20 mA |
| +5 VDC Mainframe Current | 210 mA |
Performance
| Parameter | Value |
|---|---|
| Short-Term Stability (1 s Allan Deviation) | < 1 × 10^-11 (typical < 5 × 10^-12) |
Technology
Ovenized Crystal Oscillator (OCXO)
Applications
System Reference Distribution / Timebase Calibration