A sync cutover scoped as one night of work becomes three site visits. The equipment arrived on schedule, but no fuse position was available. The antenna crew was booked by a different vendor and could not get roof access. The turn-up engineer found a rack that was powered but not grounded to spec. Nobody had a Method of Procedure saying which downstream elements to re-provision first.
None of that was a technical failure. All of it was a scope failure. When equipment, power, antenna, turn-up and documentation live in six different purchase orders, the gaps between them become the project, and that is where carrier timing projects lose weeks.
What Turnkey Actually Means
In a timing project, turnkey has a testable meaning: one party owns the outcome from the loading dock to the acceptance test, carrying the equipment, the power connection, the antenna system, the grounding, the installation, the turn-up, the cutover and the as-built documentation in a single scope.
The test is simple: if a problem appears at 2 a.m. during a cutover, how many numbers do you have to call before somebody can act? In a turnkey scope, the answer is one. In a split scope, the answer is however many vendors are in the chain, and each has a contractual reason to say the problem started on somebody else. Timing is one of the few network layers where the physical install, the RF path and the protocol layer must all be right at once. A perfectly provisioned primary reference source fed by an inadequate antenna run is still a failed install.
The Seven Places a Split Scope Breaks
1. The Equipment Ships, the Install Kit Does Not
A TimeProvider 4100 or a SyncServer S650 arrives on time yet the project still stalls, because the bill of materials covered the shelf and not the install: rack hardware for that specific frame, fuse positions, power cabling cut to size, grounding conductors and lugs, output cards, breakout panels and connectors for the interfaces the network actually uses. These elements are individually cheap, but collectively vital to a schedule, and nobody owns the list being complete. A turnkey scope prices shelf and peripherals as one delivery, built from a site survey rather than a catalog guess.
2. Power Was Assumed, Not Surveyed
Central office and hut power is the most common quiet blocker. Are there two available fuse positions on independent A and B feeds? Is there available amperage load? Does the battery distribution panel have headroom? Is the run inside the voltage drop budget? When power is a separate scope, those answers arrive on install day. A turnkey scope resolves them during the survey, and power and grounding get engineered together rather than discovered in sequence.
3. The Antenna System Is Somebody Else’s Contract
This is the most expensive split in the industry. The GNSS antenna is not an accessory to the clock. It is the reference input, and it answers to physics rather than to a procurement schedule. It needs a clear view of the horizon for signal acquisition, which means roof rights, a mount, and a cable path from roof to equipment room inside the loss budget for L1 at 1575.42 MHz. If cable loss exceeds budget, an unpowered amplifier can recover the signal without introducing additional noise. At the building entry you need lightning protection bonded to the master ground bar and to any conductive ring or structure at the entry point. That is four different trades in a split scope. In a turnkey scope, whoever sizes the clock also designs and installs the antenna system.
4. Grounding Falls Between Trades
Proper grounding at the antenna and cable entry is critical to both performance and safety. An inline ground handles the antenna and cable bonding at the entry point, ensuring a low-impedance path to the master ground bar. When installation and grounding are separate contracts, the bonding path becomes unclear and the result shows up months later as intermittent alarms on the 1PPS or frequency input, or as a surge that damages a receiver front end. Turnkey treats grounding as one design with one owner, from antenna entry through to the main ground reference.
5. There Is No MOP, So the Cutover Has No Sequence
Installing the clock is the easy half. Moving a live network onto it without dropping traffic needs a written Method of Procedure specific to your topology, installed base and maintenance window. A real MOP states the order: qualify the incoming signal before touching anything downstream, verify phase alignment against the existing reference, provision downstream elements in a defined sequence, confirm each lock before proceeding, and define the rollback at every step. That is what makes a hitless cutover hitless. It matters most where new equipment runs alongside legacy timing shelves, as in a TDM turndown or a BITS replacement, because you are sequencing two networks at once.
6. Turn-Up Is Handled by Somebody Who Did Not Do the Install
When installation and commissioning are separate contracts, acceptance becomes a green light check: no alarms on the front panel, so somebody signs. A real turn-up produces a baseline instead: satellites in view and signal to noise at the receiver, the holdover configuration, measured output against the applicable mask, and a record of the network at acceptance. Without it, every future problem becomes an open-ended investigation. Performance measurements at turn-up are cheap; reconstructing them two years into a fault is not.
7. Documentation and Decommissioning Are Nobody’s Line Item
The last five percent of the project determines what the next five years cost: as-built rack elevations and cable diagrams, the antenna design updated to match what was installed, firmware and configuration backups, and removal of the replaced equipment. Decommissioning is the piece most often dropped, and it requires the same care as installation: proper documentation ensures future maintenance teams understand what was deployed and why.
What a Turnkey Scope Actually Covers
Written as a scope of work rather than a brochure, a turnkey engagement has seven deliverables, one for each failure above.
| Phase | Deliverable |
|---|---|
| Survey and audit | Site survey, power availability, antenna path, installed base inventory |
| Design | Rack and cable diagrams, antenna design, bill of materials with peripherals |
| Equipment | Shelf, cards, mounting hardware, cabling, connectors, antenna kit |
| Power and grounding | Feed connection, fuse provisioning, bonding to the master ground bar |
| Antenna installation | Mount, cable run, amplification if needed, lightning protection, cable entry bonding |
| MOP and turn-up | Written procedure, signal qualification, phase alignment, provisioning, rollback plan |
| Acceptance and closeout | Performance measurements, as-built documentation, decommissioning |
If a quote does not contain all seven, the missing rows have not disappeared. They have moved to your team.
Dedicated Resources, Not a Crew With a Timing Ticket
Scope is what is contractually included. Dedicated resources are who does it. A general contractor can rack a shelf and pull a cable. What they usually cannot do is recognize that the receiver is holding six satellites when the site geometry should give twelve, or that older SSU 2000 shelves need a specific interface configuration before the cutover will hold.
That judgment comes from hundreds of installations, and it compounds: the team that installed your timing network already has the as-builts, the firmware baseline and the site history. When it comes time to expand the network or troubleshoot performance issues later, that same team starts from a position of institutional knowledge rather than having to reverse-engineer the original install. A fresh team on a competitive rebid (where procurement forces a new contractor selection) loses that context and must rebuild it from scratch at your expense.
Six Questions for Your Next RFP
- Is the antenna system priced as designed, or as an allowance to be trued up later?
- Who surveys power availability, and does that happen before or after the equipment ships?
- Who owns the bonding path from the antenna to the ground?
- Do you get a site-specific MOP for review before the maintenance window?
- What measurements constitute acceptance, and are they documented and delivered?
- Is removal and recycling of the replaced equipment included?
Vague answers mean hidden scope, and hidden scope is paid for in schedule as well as additional cost.
Where to Start
Most carrier timing projects do not start with an installation. They start with an accurate picture of what is installed today. This is what a synchronization audit produces: installed base, firmware and configuration state, antenna path condition, and the gaps that will surface during a cutover.
Syncworks has delivered advanced timing services across the Americas for over 20 years, providing turnkey installation and dedicated resources from equipment and power through antenna, turn-up and cutover. Talk to an engineer through Technical Support, or request a quote.
Frequently Asked Questions
What is included in a turnkey timing installation?
The site survey, the design and bill of materials, the equipment and every peripheral needed to install it, power and grounding, the GNSS antenna system, a site-specific MOP, installation and commissioning, the cutover, acceptance measurements, as-built documentation, and removal of the replaced equipment.
Why is the GNSS antenna the most common source of delay?
It is the only part of the install that depends on the building rather than the rack. Roof rights, mount type, amplification, cable path length and lightning protection all have to be resolved before the antenna goes up. In a separate contract, those approvals typically start after the equipment has already arrived.
Do I need a Method of Procedure for a sync cutover?
For any cutover on a live network, yes. The MOP defines the order in which the incoming signal is qualified, phase alignment is verified and downstream elements are re-provisioned, plus the rollback at each step. That sequence is what makes a cutover hitless.
