Tel: +44 (0) 1904 324440


York Reference Source 01

YRS01 with battery pack BP01

Image shown is of a YRS01 with a BP01 battery pack




  • Selectable noise or comb output
  • Stable output
  • 5 kHz to 1 GHz output
  • Conducted and radiated options
  • Compact and portable
  • Battery powered

Downloads for this product:

YRS01 Product Information

Test Instrumentation Range Brochure



The YRS01 is a broadband noise and comb source that is capable of producing a continuous noise output from 9 kHz to 1 GHz, or a comb of frequencies within the 5 kHz to 1 GHz range, with step size being selected by the user. The noise generator enables observation of details over the full spectral range, while the comb generator allows for the reference signal output and noise floor to be viewed simultaneously, and also the frequency accuracy of measurement equipment to be checked.

The YRS01 is compact and battery powered, allowing operation as an electrically small source, which minimises the effect of the YRS01 itself when characterising the electromagnetic environment. The YRS01 is housed in a metal enclosure so that it can be mounted in direct contact with a metal ground plane as may be required by some tests. The YRS01 is compatible with the CGE battery pack BP01.

The YRS01 is supplied with a 50 Ω N-type output connector for direct connection to conducted measurement systems. An IEC 320 adapter is also available to provide a connection to LISN equipment, as well as an RJ11/RJ14/RJ25/RJ45 adapter for connection to telecoms ISNs, to provide a reference source for conducted emissions setups.

For the radiated operation, antennas can be attached to the unit’s output connector. Two monopole antennas, optimised for different frequency bands, are available. The YRS01 is an ideal source for carrying out checks on open area test sites
(OATS) and anechoic chambers.


Selectable noise or comb output  •  Flexibility across a range of applications
Stable output•  Repeatable measurements
5 kHz to 1 GHz output•  Applications across a broad frequency spectrum
Conducted and radiated options•  Evaluation of both conducted and radiated systems
Compact and portable•  Comparisons between sites and environments
Battery powered•  No power or interconnecting cables affecting measurements


  • Investigation, characterisation and comparison of different measurement environments such as OATS, FAR or SAC.
  • Validation and verfication of radiated and conducted measurement system , such as:
    • Open Area Test Sites (OATS)
    • Fully Anechoic Rooms (FAR)
    • Semi-Anechoic Chambers (SAC)
    • Gigahertz Transverse Electromagnetic (GTEM) cells
  • Reference source for:
    • Daily pre-test checks as required by Quality Managment Systems e.g. ISO17025, DEF STAN 59-411
    • Long-term performance monitoring
    • Cable position investigation
    • Investigation and characterisation of screened room/anechoic room/OATS behaviour
    • Characterisation of filter performance
    • Cable loss measurements
  • Measuring amplifier gain and bandwidth
  • Spectrum analyser/receiver pre-check
  • Inter-laboratory test programs
  • Proficiency test programs


Noise Mode:

Frequency Range•  9 kHz to 1 GHz direct connection into 50 Ω system
 •  30 MHz to 1 GHz radiated using TLM02 and MON03 monopole antennas
Temperature  stability  •  <+/-1 dB 9 kHz to 1 GHz, at an ambient temperature of 15 ºC to 30 ºC
 •  <+/-2.5 dB 9 kHz to 1 GHz, at an ambient temperature of 5 ºC to 40 ºC
Time Stability•  <1 dB (typical over a 12 month period)
Operating time•  7.5 hours (typical with fully charged batttery pack)

Comb Mode:

Frequency Range          •  5 kHz to 1 GHz direct connection into 50 Ω system
 •  30 MHz to 1 GHz radiated using TLM02 and MON03 monopole antennas
Comb Signal Step size Selectable between:
 •  10 kHz  (5 kHz, 15 kHz, 25 kHz to 3.005 MHz min.)
 •  100 kHz  (50 kHz, 150 kHz, 250 kHz to 30.05 MHz min.)
 •  1 MHz  (0.5 MHz, 1.5 MHz, 2.5 MHz to 300.5 MHz min.)
 •  5 MHz  (2.5 MHz, 7.5 MHz, 12.5 MHz to 1.0025 GHz min.)
Temperature stabilityAmplitude:
 •  <+/-0.5 dB 5 kHz to 1 GHz, at an ambient temperature of 15 °C to 30 °C
 •  <+/-1 dB 5 kHz to 1 GHz, at an ambient temperature of 5 °C to 40 °C
 • <+/- 0.5 ppm, at an ambient temperature of 5 °C to 40 °C
Time stability•  <1 dB (typical over 12 month period)
 •  <+/-1 ppm (typical over a 12 month period)
Operating Time•  8.5 hours (typical with fully charged battery pack)


Output connector•  50 Ω N-type socket
Dimensions•  76 mm diameter x 35 mm (56 mm including connector), without battery pack
 • 76 mm diameter x 81 mm (102 mm including connector), with battery pack
Weight•  0.6 kg (including battery)
Power Supply•  5 V 2AHr battery pack (order code BP01).
    External input 5.00 V ± 0.25 V, 300 mA (mini-USB type B connector)
Indicators•  Active, low battery
Controls•  Rotary switch for mode selection


Standard order kits

Part Number DescriptionParts included
YRS01KIT01 Standard YRS01 reference sourceYRS01 reference source
 kit with antennaBP01 - rechargeable battery pack
  MON03 - 200 MHz to 1 GHz (optimum)
   270 mm long monopole antenna
YRS01KIT02Enhanced YRS01 reference sourceYRS01 reference source
 kit with multiple antennas andBP01 - rechargeable battery pack
  LISN adapterTLM02 - 30 MHz torder-nonce=642581ac39

Manufacturer's Calibrations

CAL16  Conducted output power
 9 kHz to 1 GHz, measured using a spectrum analyser. All modes
CAL17Radiated field strength
 30 MHz to 1 GHz, measured on an OATS at 3 m or 10 m using a receiver
 Noise, 1 MHz and 5 MHz modes, horizontal and vertical polarisation.
CAL18Radiated field strength
 30 MHz to 1 GHz, measured in a FAR at 3 m using a using a receiver.
 Noise, 1 MHz and 5 MHz modes, horizontal and vertical polarisation.

Typical Output Measurement Results

YRS01 noise conducted range 1
YRS01 noise conducted range 2

YRS01 noise conducted range 3

YRS01 noise radiated vertical

YRS01 noise radiated horizontal

YRS01 comb conducted range 1

YRS01 comb conducted range 2

YRS01 comb conducted range 3

YRS01 comb conducted range 4

YRS01 comb radiated vertical

YRS01 comb radiated horizontal

Note: Artifacts below the peak level are due to image scaling.


A wholly owned subsidiary of the University of York, we have been successfully delivering EMC training courses, designing and selling test instrumentation for over 20 years.

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York EMC Services Ltd
Market Square
University of York
YO10 5DD

Tel: +44 (0) 1904 324440
Fax: +44 (0) 1904 324434