A harmonic spectrum reference signal source with a comb output characteristic generating radiated and conducted emissions up to 18 GHz with 50, 80 or 100 MHz step size options. The 50MHz step size allows measurements compliant with chamber validations above 1GHz according to CISPR16.
The Comb Generator Emitter (CGE) was originally developed by York EMC Services for the evaluation of shielding effectiveness for small enclosures. In recent years however, the continuing increase in operating frequencies of IT equipment has made the CGE increasingly relevant as manufacturers seek to determine the characteristics of both their equipment and EMC measurement facilities at GHz frequencies.
The CGE01 is a broadband comb generator emitter with a useable output from 50 MHz to 18 GHz. In contrast to the comparison noise emitters (CNE), the comb generator approach has been adopted because it lends itself more to higher frequency applications. At higher frequencies the comb spectrum gives a higher output at specific frequencies which enable measurements to be made at those frequencies. It also allows a much smaller physical construction due to reduced power consumption enabling it to be used for shielding effectiveness measurements on small enclosures.
Available either with an integral monocone antenna or with a detachable monocone antenna the CGE01 can be used as a reference source for radiated emissions. The unit is battery powered so that it can be operated as an independent source without the effect of power or interconnecting cables, which would modify the fields generated. Additionally though, for making shielding effectiveness measurements of small enclosures, the actual emitter can be separated from the battery pack and operated remotely via a cable carrying only DC power. The CGE is housed in a plated metal cylindrical enclosure, thus ensuring uniformity of the field and can be orientated to give vertical or horizontal polarisation. Additionally external antennas can be attached to the output when required.
The CGE01C is supplied with a 50Ω SMA connector allowing it to be used either for the investigation of conducted systems or to be used with an external antenna. The known output allows unknowns within systems or components to be measured or calculated.
| Specifications | |
|---|---|
| Frequency Range | 50 MHz to 18 GHz direct connection into a 50Ω system |
| 50 MHz to 18 GHz radiated using an integral antenna | |
| Step Size | 80 MHz or 100 MHz switchable |
| 50 MHz or 80 MHz switchable version available to special order | |
| Output connector | 50Ω SMA socket |
| Temperature stability (15°C to 35°C) |
1 to 16 GHz: <1dB |
| 100 MHz to 18 GHz: <2dB | |
| Time stability | Typically <1dB over a 12 month period |
| Dimensions | 76mm diameter × 64mm (74mm including connector) - CGE01C with battery pack |
| 76mm diameter × 18mm (28mm including connector) - CGE01C without battery pack | |
| 76mm diameter × 92mm - CGE01R with battery pack | |
| 76mm diameter × 46mm - CGE01R without battery pack | |
| Weight | Approx 550g (including battery) |
| Power supply | 5V 2AHr battery pack. External input 5.00V ± 0.25V, 500mA |
| Operating Time | 6.5 hours typical with fully charged battery pack. |
| Indicators | Active, lower step size - green LED |
| Active, higher step size - red LED | |
| Part Number | Description | Parts Included |
|---|---|---|
CGE01KIT01
|
Standard CGE01C comb generator emitter (conducted output) kit with battery charger |
|
CGE01KIT02
|
Standard CGE01R comb generator emitter (radiated output) kit with integral monocone antenna and battery charger |
|
CGE01KIT03
|
Enhanced CGE01C comb generator emitter (conducted output) kit with detachable monocone antenna and battery charger |
|
| CGE01KIT04
|
Special CGE01C comb generator emitter with 50 & 80 MHz step size (conducted output) kit with battery charger |
|
| CGE01KIT05
|
Special CGE01R comb generator emitter with 50 & 80 MHz step size (radiated output) kit with integral monocone antenna and battery charger |
|
| CGE01KIT06
|
Enhanced, special CGE01C comb generator emitter with 50 & 80 MHz step size (conducted output) kit with detachable monocone antenna and battery charger |
|
| Accessories | ||
|---|---|---|
| MCN01 | Antenna | Detachable monocone antenna optimised 1GHz - 26GHz |
| BP01 | Battery Pack | 5V 2AHr battery pack |
| Output Measurement Results | ||
|---|---|---|
| CAL13 | Direct Output | 0 to 18GHz power measurement using spectrum analyser |
| CAL09 | Radiated Output | 1 to 18GHz electric field strength in FAR using a spectrum analyser at 3m |
Further details can be obtained from:
York EMC Services LtdTel: +44 (0)1904 434440
Last updated: 2006-Oct-25
