Sundance SMT702 - Manual (Page 55)

The SMT702 firmware implements a state machine that collects minimum,
maximum and current readings for the die temperature, Vccint and Vccaux. They
are all accessible
4.3.3
External Signal characteristics
The main characteristics of all external signals of the SMT702 are gathered into the
following table.
Analogue Inputs
Input voltage range
AC coupled option. 600 or 800mV - AC coupled via
RF transformer.
Impedance 50
Ω
.
Bandwidth ADC bandwidth: 3 Ghz (ADC datasheet).
External Reference Input
Input Voltage Level 10-15dBm (AC-coupled)
Input Impedance 50-Ohm (Termination implemented at the connector)
Frequency Range 0 – 100 MHz.
External Reference Output
Output Voltage Level 1.6 Volts peak-to-peak (AC-coupled)
Output Impedance 50-Ohm (Termination implemented at the connector)
External Sampling Clock Input
Input Voltage Level 0.5 – 3.3 Volts peak-to-peak (AC-coupled)
Input Format Single-ended or differential on option (3.3V LVPECL).
Frequency range 500-1500 MHz (DDR sampling clock)
External Trigger Inputs
Input Voltage Level 1.5-3.3 Volts peak-to-peak.
Format
DC-coupled and Single-ended (Termination implemented
at the connector). Differential on option (3.3 V PECL).
Impedance 50-Ohm.
Frequency range 62.5 MHz maximum
ADCs Output characteristics
The figures below have been obtained using WaveVision version 5 with default options.
On-board VCO used - ADCs running at 3GSPS – 16k-point FFT -
E4433B Signal Generator coupled with a 6
th
-order filter – Coherent sampling captures
Bandwidth
at -3dBs
at -6dBs
2.2GHz
2.6GHz
ENOB
373 MHz (filtered) – Full Scale-0.5dB –
3GSPS – On-board VCO
749 MHz (filtered) – Full Scale-0.5dB –
3GSPS – On-board VCO
1498 MHz (filtered) – Full Scale-0.5dB –
7.1 bits (Cha) 6.76 bits (Chb)
7.2 bits (Cha) 6.906 bits (Chb)
6.7 bits (Cha) 6.563 bits (Chb)