Timing comparison
Timing measurements are made with the radio modems in their default configuration. The measurements are made on a pair of modems performing a loop-back test. Modem A is connected to the PC Com port and Modem B has a loop-back connector.
- Time Ttot is measured from the beginning of data shifted in to Modem A to the end of loop-back data shifting out of Modem A.
- Time Tlat is measured from the beginning of data shifted in to Modem A to the beginning of data shifted out of Modem B.
The testing was performed using both 32 byte and 1 byte packets as the test data.
| | XCite XC09-009
SC / FH | XCite XC09-038
SC / FH | XStream X09-009 | XStream
X09-019 | XTend XT09 (obsolete)
115 / 9.6 | 2.4 XBee/XBee Pro 802.15.4 (S1)
115 / 9.6 |
|---|
| Data throughput (bps) | 9600 | 38400 | 9600 | 19200 | 115.2k / 9600 | 250 k |
| TX Power (mW) | 5 | 5 | 100 | 100 | 1000 | 1/100 |
| RX Sensitivity (dBm) | -108 | -104 | -110 | -107 | -100 / -110 | -92 / -100 |
| Test interface rate (Kbps) | 9.6 / 9.6 | 38.4 / 38.4 | 9.6 | 9.6 | 115.2 / 9.6 | 115.2 / 9.6 |
| Tlat (ms) w/ 1 byte | 15 / 48 | 4.2 / 13 | 48 | 42 | 8.5 / 71 | 3.9 / 7.8 |
| Ttot (ms) w/ 1 byte | 32 / 99 | 9 / 25 | 99 | 90 | 20 / 182 | 7.5 / 15.3 |
| Tlat (ms) w/ 32 bytes | 44 / 73 | 10 / 18 | 73 | 55 | 13 / 129 | 8.0 / 41.3 |
| Ttot (ms) w/ 32 bytes | 129 / 184 | 33 / 47 | 184 | 131 | 30 / 264 | 15.9 / 82.9 |
| SC = Single Channel function set FH = Frequency hopping function set |
Timing equations
- XC09-009, X09-009
- Tlat = 46.3 + (0.7 * B) ms, (0 < B <= 39), B = number of bytes
- Tlat = 74.8 ms, (B > 39)
- X09-019
- Tlat = 41.6 + (0.4 * B) ms, (0 < B <= 63), B = number of bytes
- Tlat = 66.8 ms, (B > 63)
- XT09 equations have not yet been calculated.
Note: XC09 and X09 timings are accurate to within +/- 3 ms.
| | XBee 900 HP
200 K | XBee 900 HP
200 K | XBee 900 HP
200 K | XLR
Ethernet |
|---|
| Data throughput | 200 Kbps | 200 Kbps | 200 Kbps | 1 Mbs |
| TX Power | 1 mW | 1 mW | 1 mW | 1 mW |
| RX Sensitivity | -101 dBm | -101 dBm | -101 dBm | -98 dBm |
| Test interface rate | 9600 bps | 19200 bps | 115.5 Kbps | 10/100 Base T |
| Tlat (ms) w/ 1 byte | 18 ms | 16 ms | 15 ms | 8 ms |
| Ttot (ms) w/ 1 byte | 40 ms | 35 ms | 32 ms | |
| Tlat (ms) w/ 32 bytes | 53 ms | 35 ms | 20 ms | 20 ms* |
| Ttot (ms) w/ 32 bytes | 72 ms | 52 ms | 37 ms | |
| * This was done with a 128 byte packet
At the time this article was updated, the timing specifications for Ttot on the XLR PRO had not been performed.
|
| | S2C
802.15.4
9.6k/115.2kbps | S2C
Digi Mesh 2.4
9.6k/115.2kbps | S2C
Zigbee
9.6k/115.2kbps | XBee SX/XBee PRO SX
9.6k/115.2kbps | XBee PRO XTC
9.6k/115.2kbps |
|---|
| Data throughput | 250kbps | 250kbps | 250kbps | 250kbps | 120kbps |
|---|
| TX power | 3.1/6.3 mW
63mW PRO | 6.3mW / 63mW PRO | 6.3mW / 63mW PRO | 20dBm - 30dBm | 20dBm - 30 dBm |
|---|
| RX Sensitivity | -102dBm Boost mode
-100 dBm Normal
-101dBm PRO | -102dBm | -102dBm boost mode
-100 dBm Normal
-101dBm PRO | -113dBm Low data rate
-106dBm Middle data rate
-103dBm High data rate | -110dBm (10kbps)
-100dBm (125kbps) |
|---|
| Test interface rate (BD) | 9.6kbps / 115.2kbps | 9.6kbps / 115.2kbps | 9.6kbps / 115.2kbps | 9.6kbps / 115.2kbps | 9.6kbps / 115.2kbps |
|---|
| Tlat (ms) w/ 1 byte | 8.4ms/5.8ms | 8.44ms/6.02ms | 10.9/7.2ms | 23.7ms/19.7ms | 11.64/10.44ms |
|---|
| Ttot (ms) w/ 1 byte | 16.8ms/12ms | 22.5ms/19.4ms | 22ms/17ms | 49.2ms/39.6ms | 43.2ms/36.3ms |
|---|
| Tlat (ms) w/ 32 bytes | 55ms/9.5ms | 42.6ms/9.44ms | 10.9/10.16ms | 24.6ms/20.7ms | 8.4ms/9.2ms |
|---|
| Ttot (ms) w/ 32 bytes | 85.2ms/19.9ms | 84.4ms/20ms | 88.4ms/29ms | 115.6ms/47.2ms | 92.4ms/48.6ms |
|---|
Last updated:
Jan 01, 2024