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EB-100 (Miniport)
Portable surveillance receiver

The EB-100 is a small portable surveillance receiver build in the 1980s by Rohde & Schwarz in Munich (Germany). It was intended for a variety of jobs, including frequency monitoring, radio surveillance, radio intercept, EMC measurements and direction finding. Due to its small size and wide frequency range, it is extremely useful for bug tracing. EB-100 is also known as MINIPORT.

The EB-100 covers al frequencies between 20 MHz and 1000 MHz (1 GHz) and can store approx. 30 frequencies in its built-in memory (also used for scanning). The IF bandwidth is selectable between 7.5, 15 and 150 kHz.

All controls, with the exception of the frequency adjustment, are on the front panel. Frequencies can be entered directly on the 15-button key pad at the right, and are visible on the small LCD display at the center. An old-fashined analog meter, mounted to the left of the display, is used as signal strength indicator and as battery test.
EB-100 MINIPORT receiver with English front panel

The receiver has a carrying strap and a built-in rechargeable battery, allowing portable use (i.e. carried around the neck), and is usually stored in a briefcase together with the battery charger, headphones and other accessories. It can by used for monitoring the programmed memory channels by using the (rather slow) scanning feature. For bug-tracing and EMC measurements, the EB-100 is often used in combination with the HE-100 directional antennas (see below).

The EB-100 was introduced by Rohde & Schwarz in the 1980s and for a long time, it was the de-facto standard in many countries. For this reason it was available with a German or English front panel. The receiver was replaced in the late 1990s by the much improved EB-200 and more recently by the feature-packed EB-500. For portable use, Rohde & Schwarz has developed the advanced PR-100 digital receiver. Today, the EB-100 is still a highly wanted EMC test receiver.

Briefcase with EB-100 EB-100 inside executive style suitcase EB-100 MINIPORT receiver with English front panel EB-100 front panel (English version) Mains power adapter EB-100 with helical antenna EB-100 with telescopic antenna 20-200 MHz HE-100 antenna connected to the EB-100 receiver
Switching on the 40dB attenuator Adjusting the squelch EB-100 with German front panel Rohde & Schwarz EB-100 receiver EB-100 with carrying strap Tuning the EB-100 Power and headphones connections at the rear EB-100 and HE-100 briefcases

All controls of the EB-100, except for the tuning knob, are located at the clear well-designed front panel. At the center is the frequency display with an analogue field-strength meter to its left and a 15-button keypad to its right. An antenna is connected to the BNC socket at the top left.

The EB-100 is suitable for the reception of AM and FM signals with an adjustable IF bandwidth. A 40dB attenuator can be used in close proximity of a transmitter (e.g. a bug). The squelch is adjustable and the user can toggle between the modulated signal, or a signal level tone of varying height. The frequency is selected with a large rotary dial at the right side of the receiver (tuning).

The following accessories were available for the EB-100:

  1. Optional (separate items)

HE-100 Directional Antenna
Although the EB-100 can be used with virtually any indoor or outdoor antenna, a special set of active antennas was developed by R&S, that made the EB-100 particularly useful for finding clandestine transmitters and for indoor bug tracing. This antenna set is known as the HE-100.

The HE-100 set consists of three pluggable antenna's and a pre-amplifier in the shape of a pistol grip, with a field-strength meter at the back. Depending on the required frequency range, one of the three antennas is attached to the front of the pre-amplifier, and is enabled by pressing the trigger-button on the pistol grip.

 More information
20-200 MHz HE-100 antenna connected to the EB-100 receiver

Executive style briefcase holding the three HE-100 antennas Contents of the bottom half of the briefcase Top-half of the briefcase 20-200 MHz HE-100 antenna connected to the EB-100 receiver 20-200 MHz antenna 200 - 500 MHz antenne 500 - 1000 MHz The pistol grip with built-in pre-amplifier
Close-up of the 500-1000 MHz antenna The connector of the 20-200 MHz antenna The 500-1000 MHz antenna in action The field-strength indicator at the rear of the pre-amplifier The pre-amplifier (right) and the 500-1000 MHz antenna The 500-1000 antenna ready for use The 500-1000 MHz antenna connected to the EB-100

EBZ-100 Panorama Display
The EB-100 can also be used in combination with the complementary EBZ-100 panorama display to allow part of the frequency spectrum to be monitored in real-time (around a given center frequency).

The EBZ-100 is fed by the 10.7 MHz IF-signal from the EB-100 receiver and displays a frequency span of 200 kHz (i.e. the center frequency ± 100 kHz) on its small built-in green Cathod Ray Tube (CRT).The display unit was sometimes mounted together with the EB-100 in an optional leather carrying case.
EBZ-100 panorama display

FSH-3 Spectrum Analyzer
The HE-100 antenna is sometimes also used in combination with an R&S portable spectrum analyzer such as the FSH-3 shown here.

The advantage of using an external spectrum analyzer is that it shows a wider part of the frequency spectrum than the EBZ-100 panorama display. Once a signal is discovered, the EB-100 is tuned to the desired frequency so that the signal can be intercepted.

 More information
FSH-3 Spectrum Analyzer

The EB-100 has three sockets for the connection of external devices:

  • X4
    External (rear)
  • X5
    Headphones (rear)
  • X6
    Antenna (front)
  1. 6V (charger)
  2. Illumination
  3. Signal strength (0.1 - 3.5V @ 0ω)
  4. 6V (charger)
  5. Squelch (TTL)
  6. 0V (charger)
  7. AF
  8. 0V (charger)
  1. Rohde & Schwarz, Miniport Empfänger EB 100, Betriebshandbuch
    EB-100 User Manual (German)
Further information
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Crypto Museum. Created: Thursday 27 December 2012. Last changed: Friday, 11 March 2016 - 09:06 CET.
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