Pendulum
Pendulum 6688 & 6689
1 Hz to 300 MHz Frequency Range
7 digits per second Frequency Resolution
Frequency, Period, Pulse Width, Duty Cycle, Time Interval, Totalize Measurement Functions
2 independent input channels Input Channels
1 MΩ / 50 Ω selectable Input Impedance
| Attribute | Value |
|---|---|
| Frequency Range | 1 Hz to 300 MHz |
| Frequency Resolution | 7 digits per second |
| Measurement Functions | Frequency, Period, Pulse Width, Duty Cycle, Time Interval, Totalize |
| Input Channels | 2 independent input channels |
| Input Impedance | 1 MΩ / 50 Ω selectable |
| Sensitivity | 20 mV RMS (typical) |
| Timebase Accuracy | ±1 ppm per year aging rate |
| Display | 8-digit LCD display |
| Power Supply | 90–264 VAC, 50/60 Hz |
| Operating Temperature | 0°C to 50°C |
Pendulum 6688 & 6689 Options:
- 6688 - 011 - Crystal oven standard model; 5x 10 MHz and 1x 5MHz outputs
- 6688 - 021 - Crystal oven incl. option 70; 10x 10 MHz and 1x 5MHz outputs
- 6689 - 011 - Rubidium standard model; 5x 10 MHz and 1x 5MHz outputs
- 6689 - 021 - Rubidium incl. option 70; 10x 10 MHz and 1x 5MHz outputs
- 6688 - 70 - 5 extra 10 MHz outputs (Built-In Option)
- 6688 - 22 - 19" rack mount kit
- 6688 - 27 - Carrying case
| Model | 6688 |
|---|
- 6688 Standalone Frequency Standard
- 6689 Rubidium Frequency Standard
- Distribution amplifiers for 5x10 MHz and 1x5 MHz outputs as standard
- Optional 10x10 MHz outputs
- 0.001 ppm aging in 10 years (Rubidium)
- Ideal for telecommunication test systems and calibration laboratories
