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參數(shù)資料
| 型號(hào)： | DE6003-001 |
| 英文描述： | Telecommunication IC |
| 中文描述： | 通信集成電路 |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大?。?/td> | 315K |
| 代理商： | DE6003-001 |
DE6003
10
14.Receive Delay
(t
18
)
As measured for 50% of the change of input frequency de-
viation at either antenna port to the output on the RXD pin (9) of
the 40 way connector.
15.Frequency Hop Time to Valid Received Data (t
19
–
see Figs. 6 and 7)
This is specified as the time from the rising edge of LOADB
to data being within the bit period specification.
(see note 13).
16.Transmit to Valid Received Data
(t
20
– see Fig. 3)
Transmit to valid received data
(t
20
)
is specified as the
time from the rising edge of RX/TX (this assumes that the
PA has been instructed to turn off (PAOFF low) and PA
fall time allowed to elapse before the rising edge of
RX/TX) to data being within the edge jitter requirements.
17.RF Burst to Valid Data
(t
21
)
RF burst to valid data
(t
21
)
is specified as the time from
the start of a valid RF burst of data to valid data at RXD
being within the bit period specification.
18.Time to Valid Data after Antenna Selection
(t
22
)
Time to valid data after antenna selection
(t
22
)
is speci-
fied as the time from the change of ANTSEL line to data
being within the bit period specification.
19.Channel Rejection (Modulated)
The receiver selectivity is the ratio of the interfering signal
to wanted signal power levels at which the Bit Error Rate
on the wanted signal is degraded to 10
2
5
. The wanted
signal is applied at 10dB above the measured sensitivity
level using a PRBS data pattern. The interferer is modu-
lated by a different PRBS data pattern with the same de-
viation as the wanted signal.The interferer is then in-
creased in level until the BER as measured on the wanted
channel degrades to 10
2
5
.
This is the rejection to unwanted signals and is measured
at
6
2,
6
3 and
6
10 MHz from the selected channel.
20.Channel Selectivity (Unmodulated)
Minimum rejection of signals at a frequency offset of
6
1·5MHz from the wanted signal, as defined in Table 7.
21.Receiver Spurious Rejection
Minimum rejection of signals in the bands below 1·8GHz
and above 3·3GHz. All spurious responses better than the
value defined in Table 7.
22. Receive Signal Strength Indicator (RSSI)
The RSSI output should be used for relative measure-
ment purposes only. The output, which is a measure of
the second IF energy level, is neither calibrated for a given
input signal strength nor to take account of production tol-
erance variation of the receiver’s gain and losses. Typical
RSSI response is shown in Fig. 9.
23.RSSI Delay
This is measured for 50% changed input amplitude at
either antenna port to the time at which the RSSI output
(pin 31 on the 40-way connector) is within 10% of its final
value.
24.Frequency Hop Time to Valid RSSI
(t
23
– see Fig. 6)
This is specified as the delay from the rising edge of
Fig. 9 Typical RSSI response
3·0
2·5
2·0
1·5
1·0
0·5
0
INPUT SIGNAL (dBm)
R
2
120
2
100
2
80
2
60
2
40
2
20
0
LOADB to valid RSSI, when the RSSI output is within 10%
of its final value.
25.Transmit Mode to Receive Valid RSSI
(t
24
– see Fig. 3)
This is specified as the delay from the rising edge of
RX/TX to valid RSSI, when the RSSI output is within 10%
of its final value.
26.Time to Valid RSSI after Antenna Selection
(t
26
)
Time to valid RSSI after antenna selection
(t
26
)
is
specified as the time from the change of ANTSEL line to
the time at which the RSSI output is within 10% of its final
value.
27.Receiver Conducted Emissions
These are specified as the emissions measured, at either
antenna port (terminated with 50
), with the transceiver
in receive mode.
28.Power Off to Receive Valid Data/RSSI
(t
27
)
This is the time from V
CC
being applied to the reception of
valid data being within the edge jitter requirements and
when RSSI output is within 10% of its final value.
These timing values are very dependent on the power
supply used, as all the decoupling capacitors on the
DE6003 have to be charged and this energy must be
supplied by the power supply.
29.Standby to Receive Valid Data/RSSI
(t
28
)
This is the time from STANDBY going high to the
reception of valid data being within the edge jitter require-
ments to the time at which the RSSI output is within 10%
of its final value.
30.Frequency Stability
In order to be able to demodulate data in all specified
environmental conditions the 10MHz reference oscillator
frequency stability is as specified in Table 7.
31.Transmitter In Band Spurious Emissions
These are emissions in the transmitter output which are
in the frequency range of 2·4 to 2·5GHz.
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