Amplifier Research 125S1G6 Overview
The Model 125S1G6 is a solid-state, Class A design, self-contained, air-cooled, broadband amplifier designed for applications where instantaneous bandwidth, high gain and linearity are required. Housed in a stylish contemporary cabinet, the unit is designed for benchtop use, but can be removed from the cabinet for immediate equipment rack mounting. The 125S1G6, when used with a sweep generator, will provide a minimum of 125 watts of RF power. Included is a front panel gain control which permits the operator to conveniently set the desired output level.
The 125S1G6 is protected from RF input overdrive by an RF input leveling circuit which controls the RF input level to the RF amplifier first stage when the RF input level is increased above 0 dBm. The RF amplifier stages are protected from over-temperature by removing the DC voltage to them if an over-temperature condition occurs due to cooling blockage or fan failure. There is a digital display on the front panel to indicate the operate status and fault conditions if an overtemperature or power supply fault has occurred.
The unit can be returned to operate when the condition has been cleared. All amplifier control functions and status indications are available remotely in GPIB/IEEE-488 format, RS-232 hardwire and fiber optic, USB, and Ethernet. The bus interface connector is located on the back panel and positive control of local or remote operation is assured by a Local/Remote switch on the front panel of the amplifier.
The low level of spurious signals and linearity of the Model 125S1G6 make it ideal for use as a driver amplifier in testing wireless and communication components and subsystems. It can be used as a test instrument covering multiple frequency bands and is suitable for a variety of communication technologies such as CDMA, W-CDMA, TDMA, GSM etc. It is also suitable for EMC Test applications where undistorted modulation envelopes are desired.
The export classification for this equipment is 3A001. These commodities, technology or software are controlled for export in accordance with the U.S. Export Administration Regulations. Diversion contrary to U.S. law is prohibited.
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Power Output
| Specifications | |
| RF Input | Type N Female, Front |
| RF Output | Type N Female, Front |
| Rated Power Output | 125 Watts Minimum (0.7–6 GHz) |
| Input FOR Rated Output | 1.0 Milliwatt Maximum |
| Power Output @ 3dB Compression | Nominal, 125 watts; Minimum, 120 watts |
| Power Output @ 1dB CompressionN | Nominal, 120 watts; Minimum, 100 watts |
| Small Signal Gain Flatness | ±1.5 dB Typical; ±2.5 dB maximum |
| Frequency Response | 0.7–6 GHz Instantaneously |
| Gain (at maximum setting) | 52 dB Minimum |
| gain Adjustment | (Continuous Range; 4096 steps remote) 10 dB minimum |
| Input Impedance | 50 ohms, VSWR 2.0:1 Maximum |
| Output Impedance | 50 ohms, Nominal |
| Mismatch Tolerance | 100% of rate Power without foldback. Will operate without damage or oscillation with any magnitude and phase of source and load impedance. |
| Modulation Capability | Will Faithfully Reproduce AM, FM, or pulse Modulation appearing on the Input signal |
| Third Order Intercept | 58 dBm Typical |
| Noise Figure | 10 dB Typical |
| Harmonic Distortion | Minus 20 dBc maximum at 125 watts (0.7–6.0 GHz) |
| Spurious | Minus 73 dBc Typ. |
| Phase Linearity | ±1.0 deg/100 MHz, Typ |
| Primary Power (Selected Automatically) | 90-132, 180-250 VAC; 50/60 Hz, single phase, 1200 watts maximum |
| Connectors | |
| RF | Type N Female |
| Rremote Interfaces | IEEE-488 24 pin RS-232 9 pin Subminiature D RS-232 (fiber optic) Type ST USB 2.0 Type B Ethernet RJ-45 |
| Safety INnterlock | 15 pin Subminiature D |
| Cooling | Forced air (self contained fans) |
| Export Classification | 3A001 |
| Weight | 45 kg (100 lbs) |
| Size (W x H x D) | 50.3 x 30 x 61 cm 19.8 x 11.8 x 24 in |
