RARE Shielding Systems SIMS II RP-98G Generator & RP-98D Detector , Untested

Please make sure you are buying the correct item and model for your needs and research if it will be compatible with your system before completing the purchase.

- Item for sale: RARE Shielding Systems SIMS II RP-98G Generator & RP-98D Detector , Untested
- This sale includes: 1 Unit with two power cables
- Condition: This item is used any may have scratches or scuff marks.
- Testing: This item has not been tested.

- Description:

The RP 98G Generator is an AC line only powered transmitter at 462.6 MHz (a GMRS channel (Wiki)). The output is to a BNC-f panel connector. If the transmitter was used inside the screen room there should not be any RF power outside the room. The power level can be switched between 0.1, 1 and 10 Watts. The 1/4" phone jack is for a key or remote on/off switch. Since the Audio and Aux inputs to the transmitter module are not connected I think the output is just a CW carrier.

The RP 98D Detector is a battery only powered receiver with a BNC-f panel connector. After the connector there is a Texscan 71 dB step attenuator with 9 in/out type buttons. In addition the receiver has a sensitivity switch with settings of: 0 (most sensitive), -20, -40, -60 & -80 dB. The dual Banana jacks are a relay output the closes with the signal strength meter is above some value to trip an alarm. Draws 82 ma at 12.0 V and 88 ma at 15.0 Volts.

Feeding a signal from the HP 8648A into the receiver and pressing and releasing the 20 dB attenuator button shows a slight change in sound with the power level at -126 dBm.
The frequency can be anywhere between 462.593 and 462.610 MHz. No modulation.

The meter reading changes with both power supply voltage and RF signal level. With Battery Test held down the meter reads full scale (10) at 12.5 Volts and will go higher for higher voltages. The red mark on the meter at meter reading 8 corresponds to a power supply voltage of 9.38 and at this voltage 0.32 uV can just be heard.

At 12.0 VDC and the sig gen at 1.99 Vrms you can still hear a signal with the sensitivity switch set at -80 and the attenuator at -80 dB. i.e. about 0.02 uVrms.

In use a calibration is made between the transmitter and receiver (both using an external antenna) with the screen room door open and one of the RP98 units inside and the other outside.

Then the door is closed and the receiver attenuator is changed to see how much shielding the room provides.

- Data: This unit's data has been sanitized (If applicable).
- Pictures: What you see in pictures is what you will receive. Additional accessories are not included. If we have a quantity of this item available, it might not be the exact item in pictures but it will be in similar condition.
- REC Condition: F1-C4

FH-01435