The EIP Microwave 548B is a high-performance, full-function CW microwave frequency counter designed for R&D labs and production benches. It covers frequencies from 10 Hz up to 26 GHz (expandable up to 110 GHz) and features automatic amplitude discrimination, selective power measurement capability, and high-speed tracking.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (IEEE-488) |
| Display | 12-digit LED |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100/120/220/240 VAC ±10%, 48-440 Hz |
| Operating Temperature | 0 to 50 |
| Dimensions (W×H×D) | 413 × 140 × 457 |
| Weight | 11.4 |
Frequency Measurement
| Parameter | Value |
|---|---|
| Band 1 Frequency Range | 10 Hz to 100 MHz |
| Band 2 Frequency Range | 10 MHz to 1 GHz |
| Band 3 Frequency Range | 1 GHz to 26.5 GHz (expandable to 110 GHz) |
| Band 1 Sensitivity | 25 mV RMS |
| Band 2 Sensitivity | -20 dBm |
| Band 3 Sensitivity | -30 dBm to 12.4 GHz, -25 dBm to 20 GHz, -20 dBm to 26.5 GHz |
| Automatic Amplitude Discrimination | 10 dB |
| FM Tolerance | 20 MHz p-p up to 10 MHz rate |
Acquisition & Tracking
| Parameter | Value |
|---|---|
| Normal Mode Acquisition Time | 200 ms |
| Center Frequency Mode Acquisition Time | 20 ms |
| Tracking Speed | 800 MHz/sec |
Input Characteristics
| Parameter | Value |
|---|---|
| Frequency Limit Selection | Keyboard controlled |
| Peak Damage Protection | +30 dBm continuous |
| Band 1 Input Impedance | 1 MΩ shunted by 25 pF, or 50 Ω nominal (selectable) |
| Band 2 Input Impedance | 50 Ω nominal |
| Band 3 Input Impedance | 50 Ω nominal |
| Band 1 Connector | BNC female |
| Band 2 Connector | BNC female |
| Band 3 Connector | Precision Type N female (Option 06 replaces with APC-3.5) |
| Band 3 Maximum Operating Input | +10 dBm |
Power Measurement
| Parameter | Value |
|---|---|
| Power Measurement Resolution | 0.1 dB |
| Power Measurement Accuracy | ±0.5 dB typical |
Timebase & Reference
| Parameter | Value |
|---|---|
| Standard Reference Oscillator Frequency | 10 MHz |
Ordering Options & Accessories
| Parameter | Value |
|---|---|
| Option 01 | High Stability Oven Timebase |
| Option 02 | Rear Panel Connectors |
| Option 06 | Power Measurement |
| Option 09 | Frequency Extension to 110 GHz |
Measurement Characteristics
| Parameter | Value |
|---|---|
| Frequency Resolution Settings | 1 Hz to 1 MHz selectable in decade steps |
Reference Oscillator
| Parameter | Value |
|---|---|
| Standard Reference Aging Rate | < 1 × 10^-7 / month |
| Standard Reference Temperature Stability | < 1 × 10^-6 (0 °C to 50 °C) |
| Option 01 Oven Aging Rate | < 5 × 10^-10 / day (after 72 hours warm-up) |
| Option 01 Oven Temperature Stability | < 3 × 10^-9 (0 °C to 50 °C) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +75 °C |
| Operating Altitude | Up to 3,048 m (10,000 ft) |
| Storage Altitude | Up to 12,192 m (40,000 ft) |
| Operating Humidity | Up to 95% RH at 40 °C (non-condensing) |
Frequency Reference
| Parameter | Value |
|---|---|
| External Reference Input Frequency | 1, 2, 5, or 10 MHz |
| External Reference Input Impedance | 1 kΩ nominal |
| Internal Reference Output Frequency | 10 MHz |
Option 08
| Parameter | Value |
|---|---|
| Option 08 Frequency Range | 26.5 GHz to 110 GHz |
| Option 08 Compatible Mixers | EIP 930 Series |
Software & Programming
| Parameter | Value |
|---|---|
| GPIB Emulation Modes | HP 5342A, HP 5343A |
Technology
Heterodyne / YIG-tuned preselector
Applications
Microwave Frequency and Power Measurement
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