Analog Devices ADRV9001 User Manual

Preliminary Technical Data UG-1828
Rev. PrC | Page 117 of 338
Note for the current release PLL retune time is still being characterized. This information will be updated in future releases.
Figure 118. PLL Retune
Table 43. PLL Retune Time (Limited Testing, as PLL Characterization is Still Ongoing)
Device Clock (MHz)
PLL Retune Time (µs)
Fast Normal
30 91 394
38.4 77 353
50 56 195
100 27 185
150 21 180
200 20 176
245.76
17
172
300 15 165
ADDITIONAL FREQUENCY HOPPING OPERATIONS
Rx Only with Long Propagation Delay
The ADRV9001 supports the scenario when Rx propagation delay is greater than the duration of a hop frame. This however is only
supported with Rx only modes. Tx only mode is described in the next section.
To achieve this, set the timing parameter, enableHoldDelay, to the propagation delay to keep the Rx datapath and interface alive after the
frame, or series of frames, on air has ended.
Figure 119. Rx Only with Long Propagation Delay
Tx Only with Long Propagation Delay
The ADRV9001 also supports Tx only case where the propagation delay is greater than the duration of a hop frame.
To achieve this, the user can specify a parameter as a part of the frequency hopping configuration, to delay the powering up of the Tx
delay the powering up of the Tx analog, in terms of hop frames. The user can then time the enabling of the interface, along with the using
the txRiseToAnalogOn timing parameters, to fine tune the delay.
The delay parameter specifies the delay in terms of hop frames after the first Tx setup rising edge has been received. By design, the
ADRV9001 enforces a minimum delay for both Tx and Rx of 1. However, for Tx only, this delay can be greater than 1. If the user sets it to
0, the ADRV9001 defaults the delay to 1.
24159-494
t
pllRetune
t
chRiseToAnaOn
DWELL
TRANSITION
PIN: HOP
CHANNEL
ANALOG POWER
24159-495
Rx Rx
Rx Rx
FRAMING ON AIR
FRAMING AT BBIC
PIN: HOP
PIN: Rx SETUP
Rx INTERFACE
Rx ANALOG POWER
Rx ON: LNA POWER OUT
t
RxPD
t
RxEnaHold
DWELL
DWELL
DWELLDWELL
DWELL
TRANSITIONTRANSITION TRANSITION TRANSITION

Analog Devices ADRV9001 Specifications

General

Brand	Analog Devices
Model	ADRV9001
Category	Transceiver
Language	English