Emissions Designator 3K20A3N
Decode the occupied bandwidth, modulation, signal nature, and information type.
Decoded Emission Designator
| Emission Designator | 3K20A3N |
|---|---|
| Normalized Code | 3K20A3N |
| Necessary Bandwidth | 3.20 kHz |
| Modulation Type | [A] Amplitude modulation, double-sideband |
| Signal Nature | [3] Single channel containing analog information |
| Information Type | [N] No information transmitted |
What This Means
3K20A3N is an FCC emission designator. It describes an emission with an indicated necessary bandwidth of 3.20 kHz, amplitude modulation, double-sideband, single channel containing analog information, carrying no information transmitted.
How to Read 3K20A3N
| Step | Value | Meaning |
|---|---|---|
| Bandwidth prefix | 3K20 | 3.20 kHz |
| First symbol | A | Amplitude modulation, double-sideband |
| Second symbol | 3 | Single channel containing analog information |
| Third symbol | N | No information transmitted |
Purpose on FCC Records
Emission designators are used on FCC grants and equipment authorization records to summarize the radio emission being authorized. They help identify how wide the emission is, how the carrier is modulated, whether the signal is analog or digital, and what kind of information is being transmitted.
They are useful for comparing radios, matching a grant to a modulation type, and understanding whether an authorization covers voice, data, telemetry, video, or mixed services.
An emission designator is not the whole authorization. It does not by itself prove the exact channel plan, antenna limits, output power, or every condition on the grant. For those details, read the FCC grant and the related test reports.
Bandwidth Notes
The bandwidth prefix uses a letter as both the decimal point and the unit. For example, 20K0 means 20.0 kHz, 8M91 means 8.91 MHz, and 345K means 345 kHz.
For 3K20A3N, the first four characters decode to 3.20 kHz. The remaining symbols describe modulation, signal nature, and information type.
Symbol Reference for 3K20A3N
| Symbol | Position | Category | Decoded Meaning |
|---|---|---|---|
| A | First symbol | Carrier modulation | Amplitude modulation, double-sideband |
| 3 | Second symbol | Modulating signal | Single channel containing analog information |
| N | Third symbol | Information transmitted | No information transmitted |
Regulatory Reference
The FCC classification system for emission, modulation, and transmission characteristics is defined in 47 CFR 2.201. The FCC also indicates that the full emission designation is preceded by the necessary bandwidth when the full designation is required.
FCC 2.201 Notes
- FCC emission designators combine emission classification with the necessary bandwidth of the emission.
- The three required symbols identify carrier modulation, nature of the modulating signal, and type of information transmitted.
- Fourth and fifth symbols may be added for a more complete description, but the Commission does not require them.
- When frequency modulation F is indicated, phase modulation G is also acceptable under the FCC note in this section.
- Pulse-code or other quantized direct modulation should be classified under the amplitude or angle modulation groups, not merely as pulse emission.
- The information symbol does not include constant, unvarying information such as standard frequency emissions, continuous wave emissions, or pulse radars.
- Type B damped-wave emission is an FCC exception and is forbidden.
- When the full designation is needed, the emission symbol is preceded by the necessary bandwidth as indicated in 47 CFR 2.202(b)(1).
FCC Records Using 3K20A3N
| FCC ID | Device | Frequency | Date |
|---|---|---|---|
| IKILK05-C | Lokata Limited | 121.5 MHz | 1996-09-24 |
| CCW95200000-02 | Atlantic Guest Inc | 121.5 MHz | 1996-04-03 |
| HTV95200000-02 | Litton Systems Inc | 121.5 MHz | 1995-12-12 |
| LYJE | Unit may operate with a power output of up to 50 mW ERP on 121.5 MHz until December 31, 1995 per waiver issued by the Commissions Private Radio Bureau. | 121.5 MHz | 1995-01-09 |
| B668L2ACR-RLB-28 | Unit may operate with a power ouput of up to 50 mW ERP on 121.5 MHz until December 31, 1995 per waiver issued by the Commissions Private Radio Bureau. | 121.5 MHz | 1994-11-23 |
| B668L2ACR-RLB-27 | Unit may operate with a power output of up to 50 mW ERP on 121.5 MHz until December 31, 1995 per waiver issued by the Commissions Private Radio Bureau | 121.5 MHz | 1994-11-21 |
| HTV94800000 | Litton Systems Inc | 121.5 MHz | 1994-10-19 |
| B668L2ACR-RLB-23 | EPIRB | 121.5 MHz | 1993-11-22 |
| IVR406EPIRBSVL | MPR Teltech Ltd | 121.5 MHz | 1993-10-14 |
| IKILK02-A | Unit may operate with a power output of up to 75 mW ERP on 121.5 MHz until December 31, 1995 per waiver issued by the Commissions Private Radio Bureau. Model 406-2M(A) does not satisfy GMDSS requirements. | 121.5 MHz | 1993-07-28 |
| IKILK02-B | Unit may operate with a power output of up to 75 mW ERP on 121.5 MHz until December 31, 1995 per waiver issued by the Commissions Private Radio Bureau. Model 406-2M(A) does not satisfy GMDSS requirements. | 121.5 MHz | 1993-07-28 |
| IKILK02-C | Unit may operate with a power output of up to 75 mW ERP on 121.5 MHz until December 31, 1995 per waiver issued by the Commissions Private Radio Bureau. Model 406-2M(A) does not satisfy GMDSS requirements. | 121.5 MHz | 1993-07-28 |
| ICD247350 | EPIRB | 121.5 MHz | 1993-05-27 |
| JXJ-T30S-USA | Jotron Electronics A/S | 121.5 MHz | 1993-03-10 |
| ASLJQE-2A | Raytheon Anschuetz GmbH High Seas Products | 121.5 MHz | 1993-01-22 |
| IVR406EPIRBM34 | EPIRB | 121.5 MHz | 1992-09-17 |
| HGBSURVIVOR-3 | Aquatronics | 121.5-243 MHz | 1992-05-11 |
| HTV95200000-20 | Litton Systems Inc | 121.5-243 MHz | 1992-01-24 |
| HGBSURVIVO | Aquatronics | 121.5-243 MHz | 1991-05-20 |
| IKILK01 | EPIRB | 121.5 MHz | 1990-11-19 |
| HGBSUR | Aquatronics | 121.5-243 MHz | 1990-09-10 |
| CCW8GJ-630A | Atlantic Guest Inc | 121.5-243 MHz | 1990-09-06 |
| IBRELT-E-01 | ACK Technologies Inc | 121.5-243 MHz | 1990-08-08 |
| B668L2ACR-RLB-24 | ACR Electronics, Inc. | 121.5 MHz | 1990-06-27 |
| H4KARTEXELS10 | Artex Aircraft Supplies Inc | 121.5-243 MHz | 1990-05-18 |
| H4KARTEX110 | Artex Aircraft Supplies Inc | 121.5-243 MHz | 1990-03-05 |
| IAZ406EPIRB116 | EPIRB | 121.5 MHz | 1990-01-05 |
| H4K110 | Artex Aircraft Supplies Inc | 121.5-243 MHz | 1989-10-20 |
| ADBLK01 | EPIRB | 121.5 MHz | 1989-09-12 |
| GZR3NHLDT57A | Emtrad Limited | 121.5-243 MHz | 1989-09-12 |
| GZR57B | Emtrad Limited | 121.5-243 MHz | 1989-09-06 |
| HGBSURVIVOR-1 | Aquatronics | 121.5-243 MHz | 1989-08-15 |
| HGBSURVIVOR-2 | Aquatronics | 121.5-243 MHz | 1989-08-15 |
| A9S9KBELT910 | Narco Avionics Inc | 121.5-243 MHz | 1989-06-09 |
| HO22WZ1 | AlliedSignal Canada Inc | 121.5-243 MHz | 1988-11-23 |
| FEF5CO453-0150 | Arnav Systems Inc | 121.5-243 MHz | 1988-04-13 |
| GNN3ZA-GC1243-S | Givens Ocean Survival Systems Co Inc | 121.5-243 MHz | 1987-12-16 |
| GJZ35G48153 | Emergency Locator Products Corp | 121.5 MHz | 1987-10-15 |
| FEF5CO453-0125 | This unit is type accepted under the terms of the waiver issued by the Commissions Private Radio Bureau in their letter dated Oct. 30, 1986. | 121.5-243 MHz | 1986-11-07 |