| Description: The nh:frame_data_source attribute indicates the source of the input as a two-digit hexadecimal number (i.e., one octet), represented as a string prefixed by '0x'. 0x00 is the default source when taking data of external 7.2 GHz signal or external radiometry and is the only value that indicates an observational product intended for science. All other values indicate REX-internal sources intended for diagnostics. The 4 least significant bits and the single most significant bit are not used. |
| Namespace Id: nh | Steward: sbn | Class Name: REX_Radiometry_Information | Type: ASCII_Short_String_Collapsed |
| Minimum Value: None | Maximum Value: None | Minimum Characters: 1 | Maximum Characters: 255 |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: SHORT_STRING |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | Value | Value Meaning |
| | 0x00 | The data come from the REX Analog-To-Digital converter (ADC), whose input is the wideband If output from the NH Radiometrics channel: HGA; switch assembly (SP3T switch, diplexer, filter, Low-Noise Amplifier); 4.5 MHz bandpass filter. |
| | 0x10 | Impulse mode: the data consist of 2 samples (200ns) of value 128 at the start of each REX output frame (ROF), followed by zeroes. |
| | 0x20 | The data source is an artifically-generated Low-Frequency Square Wave: +/-256 @ 610.3515625 Hz. |
| | 0x30 | The data source is an artifically-generated Mid Frequency Square Wave: +/-256 @ 19.53125 KHz. |
| | 0x40 | The data source is a Pseudo-Random Number generator with values of +/-1 @ 10 MHz. |
| | 0x50 | The data source is a Pseudo-Random Number generator (full scale) @ 10 MHz. |
| | 0x60 | The data source is an artificially-generated High Frequency Square Wave: +/-256 @ 78.125 KHz |
| | 0x70 | The data are all zeroes. |
| | 0xFF | Undefined; indicates probable corruption. |