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1 – Overview
12 DL™ User Manual Rev 3
MODELS & FEATURES
Table 1 lists the four available DL models available, each capable of multiple positioning modes of operation:
Table 1: Positioning Modes of Operation
DL Model Positioning Modes of Operation
DL-L1 DL-RT20S DL-L2 DL-RT2
Single point
√ √ √ √
Waypoint navigation
√ √ √ √
Pseudorange differential corrections (TX & RX)
√ √ √ √
Trimble CMR differential corrections (TX versions ≤ 3 & RX
version 3)
√ √ √ √
RTK pseudorange & carrier-phase double differencing: < 20
cm RMS accuracies (floating)
×
√
×
√
RTK pseudorange & carrier-phase double differencing: < 2
cm RMS accuracies (fixed)
× × ×
√
Reverse-RTK
×
√
×
√
Each model has the following standard features:
• rugged shock, water, and dust-resistant enclosure
• NovAtel’s advanced MiLLennium L1/L2 GPS technology
• capability to log data to a removable Type II or Type III PC Card ATA mass storage card (PC Card) – eliminates
the need to purchase additional data logger peripheral equipment when continuous user interaction is not required
• capability to perform autonomous scheduled data collection, with the ability to go into low-power “sleep” mode
between scheduled data-collection sessions
• smart power sensing from two independent batteries, which permits automatic switchover
• two bi-directional serial ports, one of which has power, which support data transfer rates of up to 115,200
bit/second
• obsolescence prevention due to field-upgradeable firmware (program software). What makes one DL model
different from another is software, not hardware. This unique feature means that the firmware can be updated
anytime, anywhere, without any mechanical procedures whatsoever. For example, a DL model with L1-only
capabilities can be upgraded to a model with L1/L2 RT-2 in only a few minutes in your office; instead of in the
days or weeks that would be required if the receiver had to be sent to a service depot. All that is required to
unlock the additional features is a special authorization code. See Chapter 4 for further detail on this topic.
The DL features integrated memory (PC Card) for data logging, eliminating your need to purchase additional expensive
peripheral equipment
In addition, each model has unique features. These are summarized in Table 2 on the following page: